मान लीजिए $I_n = \int \tan^n x dx, (n > 1)$ है। यदि $I_4 + I_6 = a \tan^5 x + b x^5 + C$,जहाँ $C$ समाकलन स्थिरांक है,तो क्रमित युग्म $(a, b)$ का मान क्या होगा?

  • A
    $(- \frac{1}{5}, 0)$
  • B
    $(- \frac{1}{5}, 1)$
  • C
    $(\frac{1}{5}, 0)$
  • D
    $(\frac{1}{5}, -1)$

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