Diketahui f(x) = 3x – 5 dan g(x) = x2 + 4x – 12. Nilai (f o g)(3) =
Diketahui f(x) = 3x – 5 dan g(x) = x2 + 4x – 12. Nilai (f o g)(3) = ….
A. 32
B. 28
C. 22
D. 20
E. 16
Pembahasan:
f(x) = 3x – 5 dan g(x) = x2 + 4x – 12
(f o g)(3) = …. ?
(f o g)(3) = f(g(3))
= f(32 + 4(3) – 12)
= f(9 + 12 – 12)
= f(9)
= 3(9) – 5
(f o g)(3) = 22
Jawaban: C
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