$a$ અચળ હોય ત્યારે $\frac{x^{n}-a^{n}}{x-a}$ નું $x$ ની સાપેક્ષમાં વિકલન શોધો.

  • A
    $\frac{(n-1)x^n - nax^{n-1} + a^n}{(x-a)^2}$
  • B
    $\frac{(n-1)x^n + nax^{n-1} - a^n}{(x-a)^2}$
  • C
    $\frac{(n-1)x^n - nax^{n-1} - a^n}{(x-a)^2}$
  • D
    $\frac{(n+1)x^n - nax^{n-1} + a^n}{(x-a)^2}$

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