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A. Sistem Pertidaksamaan Linear

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118<br />

Kunci Jawaban<br />

BAB 1<br />

PROGRAM LINEAR<br />

Uji Kompetensi<br />

1. b dan d<br />

3. a. 3x + 5y ≤ 15, 5x + 3y ≤ 15, x ≤ 0, y ≤ 0 dengan x, y ∈ R<br />

b. 2x – 3y ≥ – 6, x + 2y ≥ 4, 3x + 2y ≤ 12 dengan x, y ∈ R<br />

5. 3x + 4y ≤ 120 dengan x = banyaknya soal tipe I dan y = banyaknya<br />

soal tipe II<br />

7. z = 160<br />

9. a.<br />

Titik<br />

(x, y)<br />

Nilai<br />

x + 2y<br />

(1,1) (1,2) (1,3) (1,4) (2,1) (2,2) (2,3) (2,4) (2,5)<br />

3 5 7 9 4 6 8 10 5<br />

b. Nilai maksimum = 10 pada titik (2, 4)<br />

Nilai minimum = 3 pada titik (1, 1)<br />

11. 50 buku teks A dan 40 buku teks B<br />

13. Rp107.000,00<br />

15. Rp19.500,00<br />

BAB II<br />

MATRIKS<br />

Uji Kompetensi<br />

1. 13<br />

3. –6<br />

5.<br />

⎛1 2⎞<br />

⎜<br />

3 4<br />

⎟<br />

⎝ ⎠<br />

7. x = 4 dan y = 1<br />

Matematika SMA/MA Kelas XII Program Bahasa

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