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lim(n rarr oo) 1/n sum(r=1)^(2n) r/squer...

`lim_(n rarr oo) 1/n sum_(r=1)^(2n) r/squeroot(n^(2)+r^(2)) ` equals

A

`1+sqrt5`

B

`-1+sqrt5`

C

`-1+sqrt2`

D

`1+sqrt2`

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The correct Answer is:
B
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