ધારો કે $5 f(x)+4 f\left(\frac{1}{x}\right)=\frac{1}{x}+3$,જ્યાં $x > 0$. તો $18 \int \limits_1^2 f(x) \, dx$ ની કિંમત શોધો:

  • A
    $10 \log _e 2-6$
  • B
    $10 \log _e 2+6$
  • C
    $5 \log _e 2+3$
  • D
    $5 \log _e 2-3$

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જો $\int x^{49} \left[ \operatorname{Tan}^{-1} x^{50} + \frac{x^{50}}{1 + x^{100}} \right] dx = \frac{x^n}{k} f(x) + c$ હોય,તો $f(x) - f\left(\sqrt[k]{x^n}\right) =$ શોધો.

જો $I_n = \int \tan^n x \ dx$,અને $I_0 + I_1 + 2 I_2 + 2 I_3 + 2 I_4 + I_5 + I_6 = \sum_{K=1}^n \frac{\tan^K x}{K}$,તો $n = $

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