Hasil f(x) = 3 – x, g(x) = x2 + 2x – 5 dan h(x) = 2x + 1. Nilai (g o h o f )(2) =
Hasil f(x) = 3 – x, g(x) = x2 + 2x – 5 dan h(x) = 2x + 1. Nilai (g o h o f )(2) = ….
Jawab:
f(x) = 3 – x, g(x) = x2 + 2x – 5 dan h(x) = 2x + 1
f(2) = 3 – 2 = 1
(h o f )(2) = h(f(2)) = h(1)
= 2 . 1 + 1
(h o f )(2) = 3
(g o h o f )(2) = g((h o f )(2)) = g(3)
= 32 + 2 . 3 – 5
= 9 + 6 – 5
(g o h o f )(2) = 10
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