જો $\int \frac{5 \tan x}{\tan x-2} d x=x+a \log |\sin x-2 \cos x|+c$ હોય,તો $a$ ની કિંમત શોધો (જ્યાં $c$ એ સંકલનનો અચળાંક છે).

  • A
    $1$
  • B
    $-2$
  • C
    $-1$
  • D
    $2$

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$\int_{\frac{1}{\sqrt[5]{31}}}^{\frac{1}{\sqrt[5]{242}}} \frac{1}{\sqrt[5]{x^{30}+x^{25}}} d x=$

જો $\int \frac{dx}{2 \cos x + 3 \sin x + 4} = \frac{2}{\sqrt{3}} f(x) + c$ હોય,તો $f\left(\frac{2 \pi}{3}\right) =$

$\int \frac{x^{2}+1}{x^{4}+x^{2}+1} d x=$

$\int \frac{x^{2}+1}{x^{4}+x^{2}+1} dx$ નું મૂલ્ય શું છે?

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