1.

If C_r denotes the binomial coefficient ""^n C_r then (-1) C_0^2 + 2C_1^2+5 C_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)) 2^2n C_(n+1)`

ANSWER :B


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