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If m and n are positive integers, then l...

If m and n are positive integers, then `lim_(xto0) ((cos x )^(1//m) -(cos x )^(1//n))/(x ^(2))` equals to:

A

`m-n`

B

`1/n-1/m`

C

`(n-n)/(2mn)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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