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Evaluate: (i) `int(e^x)/(sqrt(4-e^(2x))) dx`(ii) `int(x^2)/(sqrt(1-x^6)) dx` |
Answer» `I=int(e^(x))/(sqrt(4-e^(2x)))dx=int(e^(x))/(sqrt(2^(2)-(e^(x))^(2)))dx` Let `e^(x)=t " or " e^(x)dx=dt` `:. I=int(dt)/(sqrt(4-t^(2)))=int(dt)/(sqrt(2^(2)-t^(2)))` `=sin^(-1)((t)/(2))+C=sin^(-1)((e^(x))/(2))+C` |
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