1.

2.4 + 4.7 + 6.10+ …. upto (n-1) terms=

Answer»

`2n^(3) + 2n^(2)`
`(1)/( 6) (n^(3) + 3n^(2) + 1)`
`2n^(3) + 2n`
`2n^(3) - 2n^(2)`

ANSWER :D


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