1.

(1^(2) )/( 1) + (1^(2) + 2^(2) )/(1+2) + (1^(2) + 2^(2)+ 3^(2) )/( 1+ 2+ 3)+ …. + n terms =

Answer»

`(N (n+3))/(4)`
`( n (n+3) )/(5)`
`(n ( n+2))/( 3)`
`(n ( n+5) )/(6)`

Answer :C


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