જો $\int {\frac{{\tan x}}{{1 + \tan x + {{\tan }^2}x}}dx} = x - \frac{K}{{\sqrt A }}{\tan ^{ - 1}}\left( {\frac{{K\tan x + 1}}{{\sqrt A }}} \right) + C,$ ($C$ એ સંકલનનો અચળાંક છે),તો ક્રમયુક્ત જોડ $(K, A)$ બરાબર છે:

  • A
    $(2, 3)$
  • B
    $(2, 1)$
  • C
    $(-2, 1)$
  • D
    $(-2, 3)$

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જો $\int \frac{2 x^{12}+5 x^9}{\left(1+x^3+x^5\right)^3} d x=\frac{x^m}{l\left(1+x^3+x^5\right)^r}+C$ હોય, તો $\frac{m-l}{r}=$

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જો $\int \frac{dx}{(x^2+9) \sqrt{x^2+16}} = \frac{1}{3 \sqrt{7}} \operatorname{Tan}^{-1} \left( K \frac{x}{\sqrt{16+x^2}} \right) + c$ હોય, તો $K=$

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