1.

Sum of n terms of the series (1^(4))/(1.3)+(2^(4))/(3.5)+(3^(4))/(5.7)+…. is equal to

Answer»

`(N(n+1)(2N^(2)+n+1))/(6(2n+1))`
`((n+1)(n^(2)+1))/(6(2n+1))`
`((n+1)((2n+1)^(2)+1))/(8(2n+1))`
`(n(n+1)((2n+1)^(2)+1))/(16(2n+1))`

ANSWER :B


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