ધારો કે $f(x)$ એ $x=a$ આગળ વિકલનીય વિધેય છે,જ્યાં $f^{\prime}(a)=2$ અને $f(a)=4$ છે. તો $\lim _{x \rightarrow a} \frac{x f(a)-a f(x)}{x-a}$ ની કિંમત ...... થાય.

  • A
    $2a + 4$
  • B
    $4 - 2a$
  • C
    $2a - 4$
  • D
    $a + 4$

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