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) is equal to

Answer»

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

Answer :B


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