1.

The value of `int_(1)^(e^(2)) (dx)/(x(1+logx)^(2))`isA. `(2)/(3)`B. `(1)/(3)`C. `(3)/(2)`D. `ln 2`

Answer» Correct Answer - A
Let ` l = int_(1)^(e^(2)) (dx)/(1+log x)^(2)`
Put ` 1+ log x = t`
` rArr 1/x dx = dt` ,
` :. L = int_(1)^(3) 1/(t^(2)) dt = [ -1/t]_(1)^(3) =2/3`


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