Diketahui=f(x)=2x-3 X+7 G(x)=3x+1 Tentukan:a.(gof)-¹(x) B.(gof)-¹(12)

A. g(f(x)) = 3(2x-3x+7) + 1
= 6x-9x+21 + 1
-3x+22
(g•f) (x)= -3x +22
y = -3x +22
y-22 = -3x
x = -y/3 + 22/3
g•f (x) -¹= -x/3+22/3
B. g•f (12) = -12/3 + 22/3
= 10/3

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