1.

If C_(r) denotes the binomial coefficient .^(n)C_(r ) then (-1) C_(0)^(2) + 2C_(1)^(2) + 5C_(2)^(2) +….+(3n-1) C_(n)^(2) =

Answer»

`(3n-2) .^(2n)C_(N)`
`((3n-2)/(2)).^(2n)C_(n)`
`(5+3n).^(2n)C_(n)`
`((3n-5)/(2)).^(2n)C_(n+1)`

ANSWER :B


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