Diketahui f(x) = 6x - 3 dan fungsi g(x) = 5x+4 , (fog)(a) = 81 ... nilai a=
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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 pfthal
f(x) = 6x - 3
g(x) = 5x + 4
(fog)(a) = 6(5(a) + 4) - 3 = 81
= 30a + 24 - 3 = 81
= 30a = 60
= a = 2