જો $f(x)$ નું $x = a$ આગળ વિકલન શક્ય હોય,તો $\mathop {\lim }\limits_{x \to a} \frac{xf(a) - af(x)}{x - a}$ ની કિંમત શું થાય?

  • A
    $f(a) - a f'(a)$
  • B
    $a f(a) - f'(a)$
  • C
    $f(a) + f'(a)$
  • D
    $a f(a) + f'(a)$

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