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int sqrt(e^x-1)dx...

`int sqrt(e^x-1)dx`

Text Solution

Verified by Experts

The correct Answer is:
`2sqrt(e^(x)-1)-2tan^(-1)sqrt(e^(x)-1)+C`

Put `(e^(x)-1)=t^(2)anddx=(2t)/((t^(2)+1))` dt. Then,
`I=int(2t^(2))/((1+t^(2)))dt=2int(1-(1)/(1+t^(2)))dt`.
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