1.

2+7+14+…..+ (n^(2) + 2n-1)=

Answer»

`N(2N^(2) + 9n+1))/( 6) `
`(2n^(2) + 9n+1)/( 6)`
`(2n^(2) + 9n+1)/( 12)`
`(2n^(2) + 9n+1)/( 24)`

Answer :A


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