Diketahui f(x) = 6x - 3 dan fungsi g(x) = 5x+4 , (fog)(a) = 81 ... nilai a=
Matematika
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Pertanyaan
Diketahui f(x) = 6x - 3 dan fungsi g(x) = 5x+4 , (fog)(a) = 81 ... nilai a=
1 Jawaban
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1. Jawaban 18Navillera
(fog)(x)
= 6(5x+4) - 3
= 30x + 21
(fog)(a) = 81
81 = 30a + 21
30a = 60
a = 2