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If and n are positive integers, then li...

If ` and n` are positive integers, then `lim_(x->0)((cosx)^(1/ m)-(cosx)^(1/ n))/(x^2)` equal 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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