A. -2
B. -1
C. 1
D. 2
E. 3
Diketahui fungsi f(x) = 6x-3, g(x) = 5x+4 dan (fog)(a) = 81. Nilai a adalah…
Jawaban Terkonfirmasi
(fog) (a) = 81
f(x) = 6x-3
g(x) = 5x+4
(fog)(x) = 6(5x+4)-3
= 30x+24-3
=30x+21
(fog)(a) = 30x + 21 = 81
=30a+21 = 81
30a = 81-21
30a=60
a=2
gatau bener gatau salah hehehe