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Verified answer
F o g (x) = f ( g(x) ) = 4x² + 8x - 3f (2x + 4) = (2x + 4)² - 4*(2x + 4) -3
sehingga f(x) = x² - 4x - 3
dari bentuk f(x) = x² - 4x - 3
y = (x - 2)² - 7
(y + 7)^(1/2) = x - 2
(y + 7)^(1/2) + 2 = x
jadi f-' (x) = (x + 7)^(1/2) + 2
semoga jelas dan membantu