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The value of ""^(2)P(1) + ^(3)P(1) + ......

The value of `""^(2)P_(1) + ^(3)P_(1) + ...... + ^(n)P_(1)` equal to

A

`(n^(2) - n + 2)/2`

B

`(n^(2) + n + 2)/2`

C

`(n^(2) + n - 2)/2`

D

`(n^(2) - n - 2)/2`

Text Solution

Verified by Experts

The correct Answer is:
D
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