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

  • A
    $\tan(x e^x) + c$
  • B
    $\sec(x e^x) \tan(x e^x) + c$
  • C
    $-\tan(x e^x) + c$
  • D
    આમાંથી કોઈ નહીં

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જો $f(x)+k$ એ $\int \frac{x^3}{\left(1+x^2\right)^3} d x$ નું $x=\tan \theta$ આદેશ લઈને મૂલ્ય મેળવીને મળે છે, અને $g(x)+c$ એ $\int \frac{x^3}{\left(1+x^2\right)^3} d x$ નું $x^2+1=z$ આદેશ લઈને મૂલ્ય મેળવીને મળે છે, તો $f(x)-g(x)+k-c=$

$\int \frac{\sin 2x}{\sin^4 x + \cos^4 x} \, dx = $

$\int \frac{\sin (\tan ^{-1} x)}{1+x^2} d x=$ . . . . . . $+C$.

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