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Evaluate:`int(ddx)/(sqrt(1+x^2)+sqrt((1+x^2)^3))` |
Answer» Correct Answer - `1+sqrt(1+t^(2))+c` `I=int(xdx)/(sqrt(1+x^(2)+sqrt((1+x^(2))^(3))))` `=int(xdx)/(sqrt((1+x^(2))(1+sqrt(1+x^(2)))))` ` "Let " 1+sqrt(1+x^(2))=t^(2)` ` :. 2tdt =(x)/(sqrt(1+x^(2)))dx` ` :. I=int2t=t+c=1+sqrt(1+t^(2))+c` |
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