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Evaluate:`int([sqrt(1+x^2)+x]^n)/(sqrt(1+x^2))dx` |
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Answer» Correct Answer - `(1)/(n)(sqrt(1+x^(2))+x)^(n)+C` ` "Let " (sqrt(1+x^(2))+x)^(n)=z` ` or n(sqrt(1+x^(2))+x)^(n-1)((x)/(sqrt(1+x^(2)))+1)dx=dz` ` or ((sqrt(1+x^(2))+x)^(n))/(sqrt(1+x^(2)))dx=(dz)/(n)` ` :. " Given integral "=int(dz)/(n)=(1)/(n)z+C=(1)/(n)(sqrt(1+x^(2))+x)^(n)+C` |
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