f(x) = x-2 g(x) = 3x+5 tentukan (g • f)^-1 (x)

f(x) = x-2
g(x) = 3x+5
(g0f)(x) = g(f(x)) = g(x-2) = 3(x-2) + 5 = 3x-6+5 = 3x-1
Misal y = (g0f)(x)
(g0f)(x) = 3x-1
y = 3x-1
3x = -y - 1
x = -y/3 - 1/3
(g0f)(x) = -x-1
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