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Limits Continuity And Differentiability

WB JEE 2010

SUBJECTIVE+2 / -02010

If f(a) = 2, f'(a) = 1, g(a) = \(-\)1 and g'(a) = 2, find the value of \(\mathop {\lim }\limits_{x \to a} {{g(x)f(a) - g(a)f(x)} \over {x - a}}\).

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