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The value of underset( n rarroo)(lim) un...

The value of `underset( n rarroo)(lim) underset(r=1)overset(r=4n)(sum)(sqrt(n))/(sqrt(r ) (3 sqrt(r)+4)sqrt(n)^(2))` is equal to

A

`(1)/(8)`

B

`(1)/(10)`

C

`(1)/(6)`

D

`(1)/(9)`

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The correct Answer is:
B
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