1.

1.6 + 2.9+ 3.12+ ….. + n ( 3n+3)=

Answer»

`N ( n+1) (n+2)`
`(n +1) (n+2) (n+3) `
`(n+2) (n+3) (n+4)`
`(n-1)n (n+1)`

ANSWER :A


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