Diketahui f(x) = x + 4, g(x) = 2x – 1, dan h(x) = x2 – 3x + 2. Nilai (g o h o f)(-2) =
Diketahui f(x) = x + 4, g(x) = 2x – 1, dan h(x) = x2 – 3x + 2. Nilai (g o h o f)(-2) = ….
A. 6
B. 4
C. 2
D. -1
E. -3
Pembahasan:
f(x) = x + 4
g(x) = 2x – 1
h(x) = x2 – 3x + 2
Kita hitung terlebih dahulu:
f(-2) = -2 + 4 = 2
(h o f)(-2) = h(2) = 22 – 3 . 2 + 2 = 0
Sehingga:
(g o h o f)(-2)
= g((h o f)(-2))
= g(0)
= 2 . 0 – 1
= -1
Jawaban: D
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