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the sum3/1^2+5/(1^2+2^2)+7/(1^2+2^2+3^2)...

the sum`3/1^2+5/(1^2+2^2)+7/(1^2+2^2+3^2)+.......` upto 11 terms

A

`7/2`

B

`11/4`

C

`11/2`

D

`60/11`

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The correct Answer is:
C
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