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2. C2 + 6. C3 + 12. C4 +….. + n (n-1) . ...

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

A

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

B

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

C

`n. (n+1) . 2^(n - 5)`

D

`n. (n+1).2 ^(n+5)`

Text Solution

Verified by Experts

The correct Answer is:
A
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