1.

`int_0^1(dx)/(sqrt(x+1)-sqrt(x))` 1 dxA. `(2sqrt2)/(3)`B. `(4sqrt2)/(3)`C. `(8sqrt2)/(3)`D. None of these

Answer» Correct Answer - B
Let ` l = int _(0)^(1) (dx)/(sqrt(1+x)-sqrt(x))=int_(0)^(1) ((sqrt(1+x)+sqrt(x))dx)/((1+sqrt(1+x)-sqrt(x))(sqrt(1+x)+sqrt(x)))`
` l = int _(0)^(1) ((sqrt(1+x)+sqrt(x)))/(1+x -x) dx = int _(0)^(1) sqrt(1+x)dx + int _(0)^(1) sqrt(x)dx = (4sqrt(2))/3`


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