Question

(gof)(x)=x2+x+1 g(x)=4x-1
dtanya f(x) dan (fog)(x)

Answer 1

4f(x) - 1 = x² + x + 1
4f(x) = x² + x + 2
f(x) = (x² + x + 2)/4

(f o g)(x) = f(4x - 1)
             = ((4x - 1)² + (4x - 1) + 2)/4
             = (16x² - 8x + 1 + 4x + 1)/4
             = (16x² - 4x + 2)/4
             = 4x² - x + (1/2)