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(g o f) (x)= 4x²+4x dan g(x) = x²-1
tentukan f(x-2) = ..?
jabarkan fungsi komposisi
(g o f) (x) = g ( f(x) ) = 4x²+4x
f(x)² - 1 = 4x²+4x
f(x)² = 4x²+4x+1
f(x) = √4x²+4x+1
= √(2x+1)(2x+1)
= √(2x+1)²
= 2x+1
f(x-2) = 2(x-2) + 1
= 2x-4+1
= 2x-3
smoga membantu.