1.

((1)/(2), (2)/(2) )/(1^3) + ((2)/(2) , (3)/(2) )/( 1^3 + 2^3) + ((3)/(2) , (4)/(2) ) / (1^(3) + 2^(3) + 3^(3) ) + ..... n terms

Answer»

`(N^2)/( (n+1)^2)`
`(n^3)/( (n+1)^3)`
`(n)/(n+1)`
`(1)/( n+1)`

ANSWER :B::C


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