Diketahui f(x) = x2 + 5x – 4, g(x) = 4x + 7, dan h(x) = x + 1. Jika (g o h o f)(a) = 19, nilai a =
Diketahui f(x) = x2 + 5x – 4, g(x) = 4x + 7, dan h(x) = x + 1. Jika (g o h o f)(a) = 19, nilai a = ….
A. 3 atau 6
B. -8 atau -2
C. -6 atau 1
D. -8 atau 3
E. -3 atau -2
Pembahasan:
f(x) = x2 + 5x – 4
g(x) = 4x + 7
h(x) = x + 1
(g o h o f)(a) = 19
Jawaban: C
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