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माना f(x) =underset( n to infty) lim u...

माना ` f(x) =underset( n to infty) lim underset( t=1) overset( n) sum ( n)/( n^(2) +x^(2)r^(2)) ` है , तो ` underset( k=1) overset( 3 ) sum k f(k) ` का मान है ( जहाँ ` x gt 0 ` )

A

` (pi)/(4)`

B

` ( pi)/(3)`

C

` (pi)/(2)`

D

` 0 `

लिखित उत्तर

Verified by Experts

The correct Answer is:
D
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