Jika g(x) = 2x – 5 dan f(x) = x2 – x + 3, fungsi komposisi (g o f)(x) =
Jika g(x) = 2x – 5 dan f(x) = x2 – x + 3, fungsi komposisi (g o f)(x) = ….
A. 4x2 – 22x + 33
B. 2x2 – 2x + 1
C. 2x2 – 2x + 11
D. x2 + x – 2
E. x2 – 3x + 8
Pembahasan:
g(x) = 2x – 5
f(x) = x2 – x + 3
(g o f)(x)
= g(f(x))
= g(x2 – x + 3)
= 2(x2 – x + 3) – 5
= 2x2 – 2x + 6 – 5
= 2x2 – 2x + 1
Jawaban: B
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