Diketahui f(x) = 2x – 5 dan

Diketahui f(x) = 2x – 5 dan g(x) = x2 + 3x – 2, nilai (g o f)(4) = ….
A.16
B.18
C.23
D.35
E.47
Pembahasan:
f(x) = 2x – 5
g(x) = x2 + 3x – 2
(g o f)(4)
= g(2 . 4 – 5)
= g(3)
= 32 + 3 . 3 – 2
= 9 + 9 – 2
= 16
Jawaban: A
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