1. f(x) = 2x+3
g(x) = 2x^2-4x+1
(gof)(x) = g(f(x)) = g(2x+3) = 2(2x+3)^2 -4(2x+3)+1 = 2(4x^2+12x+9)-8x-12+1 = 8x^2 +24x+18-8x-12+1 = 8x^2 +16x+7
Nomor 2 ada di gambar ya. Gambar yg terpotong itu tulisannya f^-1(x)
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1. f(x) = 2x+3
g(x) = 2x^2-4x+1
(gof)(x) = g(f(x)) = g(2x+3) = 2(2x+3)^2 -4(2x+3)+1 = 2(4x^2+12x+9)-8x-12+1 = 8x^2 +24x+18-8x-12+1 = 8x^2 +16x+7
Nomor 2 ada di gambar ya. Gambar yg terpotong itu tulisannya f^-1(x)