1.

C_1 + 4.C_2 +7.C_3 +…….+(3n-2).C_n=

Answer»

`(3N-4)2^(n+1)`
`(3n-2) 2^(n-1)+2`
`(3n-4) 2^n`
`(3n -4 ) 2^(2N -1) + 1`

ANSWER :B


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