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Q)

If $f(5)=15,f'(5)=3$ then $\lim\limits_{x\to 5}\large\frac{xf(5)-5f'(x)}{x-5}$ is

$(a)\;15\qquad(b)\;0\qquad(c)\;3\qquad(d)\;None\;of\;these$

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