Jika f(x) =2x+3, g(x) =x²+3x-7, Dan h(x) =2-x, maka nilai (fohog) (2) adalah

◾ Materi : Fungsi
◾ Sub materi : Fungsi Komposisi
◾ Mapel : Matematika

Jawab :
f(x) = 2x + 3
g(x) = x²+3x-7
h(x) = 2 - x

(fohog)(x) = f(h(g(x)))
f(h(x²+3x-7))
= f(2-(x²+3x-7))
= f(2-x²-3x+7)
= f(-x²-3x+9)
= 2(-x²-3x+9)+3
= -2x²-6x+18+3
= -2x²-6x+21
(fohog) (2) = -2(2)² -6(2) +21
= -8-12+21
= -20+21 = 1

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-vin