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The value of sum(r=1)^n1/(sqrt(a+r x)+sq...

The value of `sum_(r=1)^n1/(sqrt(a+r x)+sqrt(a+(r-1)x))` is -

A

`n/(sqrt(a)+sqrt(a+nx))`

B

`(sqrt(a+nx)-sqrt(a))/x`

C

`(nsqrt(a+nx)-sqrt(a))/x`

D

`n/(sqrt(a+nx)-sqrt(a))`

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The correct Answer is:
A, B
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FIITJEE-PROGRESSION & SERIES -ASSIGNMENT PROBLEMS (OBJECTIVE) LEVEL-II
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  15. The value of sum(r=1)^n1/(sqrt(a+r x)+sqrt(a+(r-1)x)) is -

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