1.

2. C_2 + 6. C_3 + 12. C_4 +….. + n (n-1) . C_n=

Answer»

`n (n - 1). 2^(n-1)`
`2N (n-1).2^(n-2)`
`n(n-1).2^(n-2)`
`2n (n+1).2^(n-1)`

Answer :C


Discussion

No Comment Found

Related InterviewSolutions