Evaluate int(dx)/((x-1)sqrt(x^(2)+4))...

Evaluate `int(dx)/((x-1)sqrt(x^(2)+4))`

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The correct Answer is:

`-(1)/(sqrt(5))log|(1)/(x-1)+1/5+sqrt((x^(2)+4)/(5(x-1)^(2)))+C`

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