Jawabanmu

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2014-03-09T11:41:02+07:00
(fog)(x)=2(x^2-1)-2
=2x^2-2-2
=2x^2-4

(fog)(x+1)=2(x+1)^2-4
=2(x^2+2x+1)-4
=2x^2+4x+2-4
=2x^2+4x-2
2014-03-09T11:56:02+07:00
F(x)= 2x-2
g(x)= x^2-1

f(g(x))
f(x^2-1)=
2x^2-4

fog(x+1)=-4 2(x+1)^2=2x^2+4x-2