NẾU F(X+1) = X2 -5X +1 THÌ F(X) =A. 2X2 – 6X +2 B. X2 – 3X +3 C. X2 –...

Câu 43: Nếu f(x+1) = x

2

-5x +1 thì f(x) =A. 2x

2

– 6x +2 B. x

2

– 3x +3 C. x

2

– 5x +2 D. 5x

2

+ x +1 E. x

2

– 7x +7