JEE Math Practice Question
Let f(x) be a differentiable function at x = a with f'(a) = 2 and f(a) = 4. Then $$\mathop {\lim }\limits_{x \to a} {{xf(a) - af(x)} \over {x - a}}$$ equals :
- A.4 $$-$$ 2a
- B.2a + 4
- C.a + 4
- D.2a $$-$$ 4
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