Question

Dik.. G(x)=x-4
(f•g)(x)=2x2-19x+51
Dit.. f (x+1)=.....

Answer 1

Misal g(x) = y ===> y =  x - 4 ===> x = y + 4
(fog)(x) = f(g(x)) = 2x² - 19x + 51

=>  f(y) = 2(y + 4)² - 19(y + 4) + 51

=> f(y) = 2(y² + 8y + 16) - 19y - 76 + 51

=> f(y) = 2x² + 16y + 32 - 19y - 76 + 51

=> f(y) = 2y² - 3y + 7

=> f(x) = 2x² - 3x + 7

f(x + 1) = 2(x + 1)² - 3(x + 1) + 7

sisanya ente terusin gan...ok?