""^(n+1)C(2)+2(""^(2)C(2)+""^(3)C(2)+""^...

`""^(n+1)C_(2)+2(""^(2)C_(2)+""^(3)C_(2)+""^(4)C_(2)+....+""^(n)C_(2))` का मान है

A

`sumn`

B

`sumn^(2)`

C

`sumn^(3)`

D

`((n+1))/(2)`

Verified by Experts

The correct Answer is:

B

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