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Home  >>  CBSE XII  >>  Math  >>  Integrals
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$\Large\int \frac {2xdx}{1+x^4}=$\[(a)\;\tan^{-1} (x^2) \qquad (b)\;\frac{1}{2}\tan^{-1} x^2 \qquad(c)\;log (1+x^4)\qquad(d)\;\tan^{-1} \bigg(\frac{1}{x^2}\bigg)\]

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