F(x+1)=x²-1 Dan g(x)=2x tentukan nilai (gof)(x)?
F(x+1)=x2-1
=(x+1)2 -1
=x2-2x+1-1
f(x)=x2-2x
(gof)(x)=g(f(x))
=2(x2-2x)
=2×2-4x
(dibaca:2x kuadrat dikurangi 4x)
F(x+1)=x²-1 Dan g(x)=2x tentukan nilai (gof)(x)?
F(x+1)=x2-1
=(x+1)2 -1
=x2-2x+1-1
f(x)=x2-2x
(gof)(x)=g(f(x))
=2(x2-2x)
=2×2-4x
(dibaca:2x kuadrat dikurangi 4x)