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The sum of n terms of the series (3)/(1^...

The sum of `n` terms of the series `(3)/(1^(2))+(5)/(1^(2)+2^(2))+ (7)/(1^(2)+2^(2)+3^(2))+.. .. ..` is

A

a. `(6 n)/(n+1)`

B

b.` (9 n)/(n+1)`

C

c. `(12 n)/(n+1)`

D

d. `(3 n)/(n+1)`

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The correct Answer is:
A
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HIMALAYA PUBLICATION-MATHEMATICAL INDUCTION AND SUMMATION OF SERIES-Question Bank
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