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f(x) = 2^(3x)
g(x) = ^2log4x
maka
(gof)(x) =
g(f(x)) =
^2log[4 .2^(3x)] =
^2log[2^2 .2^(3x)] =
^2log[2^(3x+2)] =
(3x+2) .^2log2 =
3x+2
jadi
(gof)(x) = 3x+2
note: ^ adalah pangkat