$\int \frac{x}{x^4 - 1} dx = $

  • A
    $\frac{1}{4} \log \left| \frac{x^2 - 1}{x^2 + 1} \right| + c$
  • B
    $\frac{1}{4} \log \left| \frac{x^2 + 1}{x^2 - 1} \right| + c$
  • C
    $\frac{1}{2} \log \left| \frac{x^2 - 1}{x^2 + 1} \right| + c$
  • D
    $\frac{1}{2} \log \left| \frac{x^2 + 1}{x^2 - 1} \right| + c$

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$\int \sec^p x \tan x \, dx = $

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

यदि $\int \sqrt[3]{x}\left\{1+\sqrt[3]{x^4}\right\}^{1 / 7} d x=A\left(1+\sqrt[3]{x^4}\right)^B+c$ है,तो $A B$ का मान ज्ञात कीजिए।

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