F(x) =3x+5,gof(x) =6x+19 tentukan fungsi g(x)?

(gof)(x) = 6x + 19
g(f(x)) = 6x + 19
g(3x+5) = 6x + 19
misal, u = 3x + 5
x = (u-5)/3
g(u) = 6((u-5)/3) + 19
g(u) = 2u-10+19
g(u) = 2u+9
g(x) = 2x+9

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