ધારો કે $I_{n} = \int_{1}^{e} x^{19}(\log |x|)^{n} dx$,જ્યાં $n \in N$. જો $(20) I_{10} = \alpha I_{9} + \beta I_{8}$,પ્રાકૃતિક સંખ્યાઓ $\alpha$ અને $\beta$ માટે હોય,તો $\alpha - \beta$ ની કિંમત ..... થાય.

  • A
    $2$
  • B
    $1$
  • C
    $3$
  • D
    $4$

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ધારો કે $\int\limits_0^1 {{{\tan }^{ - 1}}\left( {\frac{{\tan x}}{2}} \right)} dx = \alpha $ છે,તો $\int\limits_0^1 {{{\tan }^{ - 1}}\left( {\frac{{\tan x - 2\cot x}}{3}} \right)} dx$ ની કિંમત શોધો.

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