If ^n-1Cr=(k^2-3)^n C(r+1),t h e nk in ...

If `^n-1C_r=(k^2-3)^n C_(r+1),t h e nk in ` `(-oo,-2]` b. `[2,oo)` c. `[-sqrt(3),sqrt(3)]` d. `(sqrt(3),2]`

A

`(-oo,-2)`

B

`[-2,-sqrt(3))`

C

`[-sqrt(3),0]`

D

`(sqrt(3),2]`

Verified by Experts

The correct Answer is:

b,d

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