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Evaluate int (dx)/((x+1)sqrt(1-x^2))...

Evaluate `int (dx)/((x+1)sqrt(1-x^2))`

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The correct Answer is:
`(t=(1)/(1+x))`
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ARIHANT PUBLICATION-CHSE ODISHA EXAMINATION PAPER - 2018 -SHORT ANSWER TYPE QUESTIONS (ANSWER ANY THREE QUESTIONS)
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