g(x)=x-1,fog(x)=2x²-4x+3,tentukan nilai f(x+1)

jawab

fungsi

fog(x) =  2x² - 4x + 3
f{ g(x) } = 2x² - 4x + 3
f(x -1)  = 2x² - 4x + 2
f(x-1 + 2) = 2(x +2)² - 4(x +2) + 2
f(x+ 1) =  2(x² + 4x + 4) - 4x - 8 + 2
f(x+1) = 2x² +8x +8 - 4x - 8 + 2
f(x+1) = 2x² + 4x + 2