Jawabanmu

2014-03-01T23:24:19+07:00
(fog)(x):f(g(x)) f(2x+1) 1-(2x+1)^2 1-4x^2+4x+1 4x^2+4x (gof)(x):g(f(x)) g(1-x^2) 2(1-x^2)+1 2-2x^2+1 2x^2+1 2[(fog)(x)+(gof)(x)]:2[4x^2+4x+2x^2+1] 8x^2+8x+4x^2+2 12x^2+8x+2