1.

The sum of n terms of the series : 5 + 11 + 19+ 29+ 41 . . . is

Answer»

`(N(n-1)(n-+7))/(5)`
`(n (n+2)(n+4))/(3)`
`(n(n+5)(n+1))/(9)`
`((n+1)(n+3)(n+7))/(5)`

ANSWER :B


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