જો $\int \frac{2 x^2}{\left(2 x^2+\alpha\right)\left(x^2+5\right)} d x=\frac{\sqrt{5}}{3} \tan ^{-1} \frac{x}{\sqrt{5}}-\frac{\sqrt{2}}{3} \tan ^{-1} \frac{x}{\sqrt{2}}+c$ હોય,તો $\alpha=$

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

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$\int \frac{x+1}{x(1+x e^x)^2} d x=$

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જો $f(x)$ એ $x$ માં દ્વિઘાત બહુપદી હોય કે જેથી $f(0)=3, f(1)=3, f(2)=-3$ થાય. તો,$\int \frac{f(x)}{x^3-1} d x=$

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