f(a + 1)=a²-1 dan g(a)= 2a,maka(fog)(4)=
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Pertanyaan
f(a + 1)=a²-1 dan g(a)= 2a,maka(fog)(4)=
1 Jawaban
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1. Jawaban kellyxue
f(a+1) = a²-1
f(a+1) = (a+1)² -2a-2
f(a+1)=(a+1)²-2(a+1)
f(x)=x²-2x
g(a)=2a
g(4)=2(4)=8
(fog)(4) = f(g(4)) = f(8)=8²-2(8)=64-16= 48