1.

The value of `int _(0)^(2) (3^sqrt(x))/(sqrt(x)) ` dx isA. `(2)/(log3)(3^(sqrt2)-1)`B. 0C. `2(sqrt2)/(log3)`D. `(3^(sqrt2))/(sqrt2)`

Answer» Correct Answer - A
Put ` sqrt(x) = t rArr 1/(sqrt(x)) dx = 2 dt `
Also , as x = 0 to 2 so , `t = 0 "to" sqrt(2)`
` :. int _(0)^(2) (3^(sqrt(x)))/(sqrt(x)) dx = 2 int _(0)^(sqrt(2)) 3^(t) dt = 2 [ (3^(t))/(log 3)]_(0)^(sqrt(2)) = 2/(log 3 ) (3 ^(sqrt(2)) -1)`


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