{"id":282126,"date":"2020-05-01T11:49:41","date_gmt":"2020-05-01T04:49:41","guid":{"rendered":"https:\/\/quipperhome.wpcomstaging.com\/?p=282126"},"modified":"2020-05-01T11:49:41","modified_gmt":"2020-05-01T04:49:41","slug":"program-linear-matematika-kelas-12","status":"publish","type":"post","link":"https:\/\/quipperhome.wpcomstaging.com\/mapel\/matematika\/program-linear-matematika-kelas-12\/","title":{"rendered":"Program Linear &#8211; Matematika Kelas 12"},"content":{"rendered":"<div id=\"attachment_282142\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-282142\" class=\"size-full wp-image-282142\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-7.png\" alt=\"Program Linear - Matematika Kelas 12\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-7.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-7-768x512.png 768w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-7-585x390.png?crop=1 585w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-7-263x175.png?crop=1 263w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-7-300x200.png 300w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282142\" class=\"wp-caption-text\">Foto: freepik.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Hai Quipperian, bagaimana kabarnya? Semoga selalu sehat dan tetap semangat belajar, ya.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Siapa di antara kamu yang menyukai Matematika? Menurut kamu, apa sih keuntungan belajar Matematika? Salah satu keuntungan belajar Matematika adalah mampu memodelkan setiap keadaan secara numerik, terutama bagi seorang pedagang.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Contohnya ada seorang pedagang lilin yang memiliki modal usaha Rp800.000 dengan kios mini yang hanya mampu menampung 500 bungkus lilin. Harga beli lilin A per bungkusnya Rp2.000 dan lilin B per bungkusnya Rp1.000.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Agar modal yang dimiliki penjual tersebut bisa digunakan sepenuhnya untuk membeli lilin sesuai kapasitas kios dan tanpa harus berhutang, bagaimana model matematika yang sesuai? Nah, temukan caranya di pembahasan program linear kali ini.<\/span><\/p>\n<h2><b>Pengertian Program Linear<\/b><\/h2>\n<div id=\"attachment_282149\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-282149\" class=\"size-full wp-image-282149\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-1a.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-1a.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-1a-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-1a-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282149\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Program linear adalah metode yang digunakan untuk menyelesaikan suatu masalah dalam bentuk pertidaksamaan linear. Saat mempelajari program linear, sama artinya kamu belajar grafik pertidaksamaan. Adapun bentuk umum pertidaksamaan linearnya adalah a<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + b<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 c.<\/span><\/p>\n<h2><b>Menggambar Daerah Pertidaksamaan<\/b><\/h2>\n<div id=\"attachment_282147\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-282147\" class=\"size-full wp-image-282147\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-2.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-2.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-2-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-2-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282147\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Jika dinyatakan dalam bentuk gambar, pertidaksamaan linear akan membentuk daerah di sebelah kanan atau kiri garis. Adapun langkah-langkah yang harus kamu perhatikan saat menggambar daerah pertidaksamaan adalah sebagai berikut.<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Menentukan 2 titik potong yang dilewati persamaan garis a<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + b<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> = c. Titik potong yang digunakan adalah sumbu x dan sumbu y.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Menentukan daerah penyelesaian, bisa juga himpunan penyelesaian menggunakan 2 metode, yaitu metode titik uji dan metode a<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + b<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> &gt; c (daerah sebelah kanan garis) atau a<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + b<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> &lt; c (daerah sebelah kiri garis), dengan a &gt; 0.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Untuk lebih jelasnya, simak contoh soal berikut.<\/span><\/p>\n<h3><b>Contoh Soal 1<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Gambarlah daerah pertidaksamaan 2<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\">!<\/span><\/p>\n<p><b>Pembahasan:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Pertama, kamu harus mencari dua titik potong garis 2<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> = <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282139\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-a.png\" alt=\"\" width=\"182\" height=\"84\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Oleh karena pertidaksamaan 2<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> bisa diubah menjadi 2<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> \u2013 <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 0, maka daerah yang diambil adalah daerah kiri.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282138\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-b.png\" alt=\"\" width=\"148\" height=\"122\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan di atas adalah cara untuk menggambarkan grafik dari pertidaksamaan yang diketahui. Selanjutnya, kamu akan belajar bagaimana cara menentukan pertidaksamaan dari daerah yang diketahui.<\/span><\/p>\n<h2><b>Menentukan Pertidaksamaan dari Daerah yang Diketahui<\/b><\/h2>\n<div id=\"attachment_282146\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-282146\" class=\"size-full wp-image-282146\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-3.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-3.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-3-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-3-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282146\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Adapun langkah-langkahnya adalah sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">1. Menentukan persamaan garisnya terlebih dahulu. Persamaan garis sudah kamu pelajari di bagian gradien.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">2. Saat menentukan persamaan garis pada koordinat kartesius, dibutuhkan minimal dua titik yang diketahui. Kedua titik tersebut dimisalkan sebagai (<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\">1, <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\">1) dan (<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\">2, <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\">2). Lalu, substitusikan kedua nilai <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> dan <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> ke persamaan berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282137\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-c.png\" alt=\"\" width=\"160\" height=\"71\" \/><\/span><\/p>\n<p><span style=\"font-weight: 400;\">3. Quipperian juga bisa menggunakan cara berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282136\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-d.png\" alt=\"\" width=\"634\" height=\"379\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-d.png 634w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-d-300x179.png 300w\" sizes=\"(max-width: 634px) 100vw, 634px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Pada prinsipnya, untuk menentukan pertidaksamaan&#8212;baik melalui titik uji atau metode gambar di atas&#8212;daerah kanan akan merupakan daerah besar dan kiri daerah kecil jika a &gt; 0.<\/span><\/p>\n<h2><b>Sistem Pertidaksamaan Linear<\/b><\/h2>\n<div id=\"attachment_282145\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-282145\" class=\"size-full wp-image-282145\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-4.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-4.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-4-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-4-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282145\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Sistem pertidaksamaan linear merupakan gabungan dari beberapa pertidaksamaan linear. Daerah penyelesaian merupakan daerah yang diarsir.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk lebih jelasnya, perhatikan contoh soal berikut.<\/span><\/p>\n<h3><b>Contoh Soal 2<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Gambarlah daerah pertidaksamaan dari sistem pertidaksamaan berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">2<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + 3<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2265 6;<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> \u2265 3;<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 5; dan<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 8.<\/span><\/p>\n<p><b>Pembahasan:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Pertama, tentukan titik potong untuk masing-masing pertidaksamaan.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk 2<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + 3<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2265 6<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282135\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-e.png\" alt=\"\" width=\"186\" height=\"81\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Untuk <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> \u2265 3<\/span><\/p>\n<p><span style=\"font-weight: 400;\">(3, 0) (3, 1)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 5<\/span><\/p>\n<p><span style=\"font-weight: 400;\">(0, 5) (1, 5)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 8<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282134\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-f.png\" alt=\"\" width=\"167\" height=\"79\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Gambarnya akan menjadi seperti berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282133\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-g.png\" alt=\"\" width=\"210\" height=\"209\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-g.png 210w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-g-150x150.png 150w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-g-200x200.png 200w\" sizes=\"(max-width: 210px) 100vw, 210px\" \/><\/p>\n<h2><b>Membuat Model Pertidaksamaan dari Soal Cerita<\/b><\/h2>\n<div id=\"attachment_282144\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-282144\" class=\"size-full wp-image-282144\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-5.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-5.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-5-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-5-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282144\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Banyak kegiatan sehari-hari yang perlu melibatkan matematika, seperti mencari keuntungan maksimum bagi pedagang, mencari biaya produksi minimum, menentukan omzet tertinggi dari suatu bisnis, dan sebagainya.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk menyelesaikan masalah tersebut, kamu harus mengubahnya menjadi bahasa matematika. Contohnya seperti pedagang lilin yang ada di pertemuan awal materi ini.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ada seorang pedagang lilin yang memiliki modal usaha Rp800.000 dengan kios mini yang hanya mampu menampung 500 bungkus lilin. Harga beli lilin kecil per bungkusnya Rp2.000 dan lilin besar per bungkusnya Rp1.000.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Agar modal yang dimiliki penjual tersebut bisa digunakan sepenuhnya untuk membeli lilin sesuai kapasitas kios dan tanpa harus berhutang, bagaimana model Matematika yang sesuai?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Yuk, bantu si pedagang!<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Pertama, tentukan dahulu benda apa saja yang dibicarakan pada soal di atas, yaitu lilin A dan lilin B.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Tentukan variabel masing-masing lilin. Misalnya lilin A = <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> dan lilin B = <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Jika dijabarkan secara matematis, menjadi seperti berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282132\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-h.png\" alt=\"\" width=\"457\" height=\"134\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-h.png 457w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-h-300x88.png 300w\" sizes=\"(max-width: 457px) 100vw, 457px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Dengan demikian, model matematika yang sesuai adalah sebagai berikut.<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 500 (jumlah lilin tidak boleh melebihi 500)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">2.000<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + 1.000<\/span><i><span style=\"font-weight: 400;\">y <\/span><\/i><span style=\"font-weight: 400;\">\u2264 800.000 (jumlah pembelian tidak boleh melebihi modalnya)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Oleh karena <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> dan <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> mewakili banyak benda, maka <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\">,<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2265 0.<\/span><\/p>\n<h2><b>Mencari Nilai Maksimum dan Minimum pada Soal Cerita<\/b><\/h2>\n<div id=\"attachment_282143\" style=\"width: 810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-282143\" class=\"size-full wp-image-282143\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-6.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-6.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-6-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-6-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><p id=\"caption-attachment-282143\" class=\"wp-caption-text\">Foto: pixabay.com<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Pada soal cerita, biasanya ditanyakan penerapan nilai maksimum dan minimum. Misalnya keuntungan maksimum, biaya produksi minimum, pendapatan maksimum, dan sebagainya.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Sebelum memecahkan masalah pertidaksamaan pada soal cerita, Quipperian harus mengenal titik pojok dan garis selidik.<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Titik pojok adalah titik untuk mengidentifikasi nilai maksimum suatu grafik pertidaksamaan. Titik ini berada di titik sudut daerah terdefinisi.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Garis selidik digunakan jika titik pojok pada suatu daerah cukup banyak dan lebih dari satu titik belum diketahui.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Untuk lebih jelasnya, perhatikan contoh soal berikut.<\/span><\/p>\n<h3><b>Contoh Soal 3<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Luas daerah suatu lahan parkir adalah 1.760 m\u00b2<\/span><span style=\"font-weight: 400;\">. Luas rata-rata untuk mobil kecil 4 m\u00b2<\/span><span style=\"font-weight: 400;\"> dan mobil besar 20 m\u00b2<\/span><span style=\"font-weight: 400;\">. Daya tampung maksimum hanya 200 kendaraan. Biaya parkir mobil kecil Rp5.000\/jam dan mobil besar Rp8.000\/jam. Jika dalam satu jam terisi penuh dan tidak ada kendaraan yang pergi dan datang, berapakah penghasilan maksimum tukang parkirnya?<\/span><\/p>\n<p><b>Pembahasan:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Diketahui:<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> = banyaknya mobil kecil yang terparkir dalam satu jam<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> = banyaknya mobil besar yang terparkir dalam satu jam<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tabel keterkaitan<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282131\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-i.png\" alt=\"\" width=\"500\" height=\"121\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-i.png 500w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-i-300x73.png 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Model matematikanya adalah sebagai berikut.<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 200;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">4<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + 20<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 1.760 atau <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + 5<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> \u2264 440;<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> \u2265 0; dan<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">y <\/span><\/i><span style=\"font-weight: 400;\">\u2265 0.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk fungsi objektifnya adalah <\/span><i><span style=\"font-weight: 400;\">z<\/span><\/i><span style=\"font-weight: 400;\"> = <\/span><i><span style=\"font-weight: 400;\">f<\/span><\/i><span style=\"font-weight: 400;\">(<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\">, <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\">) = 5.000<\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + 8.000<\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\">, sehingga gambar daerahnya adalah sebagai berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282130\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-j.png\" alt=\"\" width=\"306\" height=\"238\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-j.png 306w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-j-300x233.png 300w\" sizes=\"(max-width: 306px) 100vw, 306px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Gunakan metode titik pojok. Salah satu titik C belum diketahui, tetapi bisa dengan mudah dicari dengan eliminasi.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282129\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-k.png\" alt=\"\" width=\"139\" height=\"114\" \/><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Substitusikan nilai <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> ke persamaan <\/span><i><span style=\"font-weight: 400;\">x<\/span><\/i><span style=\"font-weight: 400;\"> + <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> = 200, diperoleh <\/span><i><span style=\"font-weight: 400;\">y<\/span><\/i><span style=\"font-weight: 400;\"> = 140. Dengan demikian C (140, 60).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Substitusikan semua titik sudut yang diketahui.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-282128\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-l.png\" alt=\"\" width=\"507\" height=\"120\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-l.png 507w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2020\/05\/Program-Linear-Matematika-Kelas-12-l-300x71.png 300w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, pendapatan maksimum tukang parkirnya adalah Rp1.180.0000.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Bagaimana Quipperian, mudah bukan? Semoga materi ini bisa bermanfaat buat Quipperian semua. Jangan lupa tetap semangat belajar untuk hari esok yang lebih berprestasi.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk mendukung prestasimu, <\/span><a href=\"https:\/\/subscribe.quipper.com\/signup\/id\"><b>Quipper Video<\/b><\/a><span style=\"font-weight: 400;\"> hadir dengan berbagai fitur menarik yang bisa kamu manfaatkan saat belajar kapanpun dan dimanapun. <\/span><i><span style=\"font-weight: 400;\">So, <\/span><\/i><span style=\"font-weight: 400;\">tunggu apa lagi. Ayo, berlangganan Quipper Video sekarang!\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">[spoiler title=SUMBER]<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><a href=\"https:\/\/d14fikpiqfsi71.cloudfront.net\/media\/W1siZiIsIjIwMTUvMTEvMTYvMTcvMjMvNDEvNGM1OGNmNjUtZjFlNy00OWU4LWJhN2QtM2I3YjczYTM5NDBjL01hdGVtYXRpa2ElMjBzZXNpJTIwOC5wZGYiXV0.pdf?sha=69b8ca321f7ab1c1\"><span style=\"font-weight: 400;\">https:\/\/d14fikpiqfsi71.cloudfront.net\/<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\"><a href=\"http:\/\/staffnew.uny.ac.id\/upload\/198401312014042002\/pendidikan\/MATERI%20PROGRAM%20LINEAR.pdf\"><span style=\"font-weight: 400;\">http:\/\/staffnew.uny.ac.id<\/span><\/a><span style=\"font-weight: 400;\">[\/spoiler]<\/span><\/li>\n<\/ul>\n<p><b>Penulis: Eka Viandari<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hai Quipperian, bagaimana kabarnya? Semoga selalu sehat dan tetap semangat belajar, ya. Siapa di antara kamu yang menyukai Matematika? Menurut kamu, apa sih keuntungan&hellip;<\/p>\n","protected":false},"author":99400369,"featured_media":282142,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[679384888,679384865],"tags":[679385780],"ppma_author":[679386827],"class_list":["post-282126","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mapel","category-matematika","tag-matematika-kelas-12"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Program Linear - Matematika Kelas 12 - Quipper Blog<\/title>\n<meta name=\"description\" content=\"Program linear adalah metode yang digunakan untuk menyelesaikan suatu masalah dalam bentuk pertidaksamaan linear. 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