If \(\mathop {{\rm{lim}}}\limits_{x \to 1} \frac{{{x^2} - ax + b}}{{x - 1}} = 5\), then a + b is equal to:

If \(\mathop {{\rm{lim}}}\limits_{x \to 1} \frac{{{x^2} - ax + b}}{{x

1.	If \(\mathop {{\rm{lim}}}\limits_{x \to 1} \frac{{{x^2} - ax + b}}{{x - 1}} = 5\), then a + b is equal to:
A.	-4
B.	5
C.	-7
D.	1
Answer» D. 1