જો $I_{n} = \int_{0}^{\frac{\pi}{4}} \tan^{n} x \, dx$,જ્યાં $n$ એ ધન પૂર્ણાંક છે,તો $I_{10} + I_{8}$ ની કિંમત શોધો.

  • A
    $9$
  • B
    $\frac{1}{7}$
  • C
    $\frac{1}{8}$
  • D
    $\frac{1}{9}$

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