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If n in N, then sum(r=0)^(n) (-1)^(n) (...

If n `in` N, then `sum_(r=0)^(n) (-1)^(n) (""^(n)C_(r))/(""^(r+2)C_(r))` is equal to .

A

`(3!)/(2(n-3))`

B

`(3!)/(2(n+3))`

C

`(3!)/((n+3))`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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