jika (f o g) (x) = x²-1 dan g(x)= x+3 maka f(x) =
Matematika
okyputra1
Pertanyaan
jika (f o g) (x) = x²-1 dan g(x)= x+3 maka f(x) =
1 Jawaban
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1. Jawaban dedenkusnandar
(fog) (x) = x² - 1
f (g(x)) = x² - 1
f(x + 3) = x² - 1
misal x + 3 = p maka x = p - 3
f(p) = (p - 3)² - 1
f(p) = p² - 6p + 9 - 1
f(p) = p² - 6p + 8
f(x) = x² - 6x + 8