Question

Tentukan f(x) jika fungsi f:R => R, g:R =>R didefenisi oleh g(x) dan (g°f) (x).

b) g(x) = x+4
dan
(g°f) (x)= x²+2x -7

Answer 1

Verified answer

Answer 2

G(x) = X + 4 ; gof(x) = x^2 + 2x-7
mis: f(x) = ax^2 + bx + c
gof(x) = g(f(x))
x^2 + 2x - 7 = ax^2 + bx + c + 4
maka a = 1   b = 2    c+ 4 = -7
                                   c = - 11
maka f(x) = x^2 + 2x - 11
^dibaca pangkat