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If y = sqrt(cos 2x ) then y (d ^(2) y )/...

If `y = sqrt(cos 2x )` then `y (d ^(2) y )/(dx ^(2)) + 2y ^(2) =`

A

` 0`

B

`- ((dx )/(dx))^(2)`

C

`((dy)/(dx)) ^(2)`

D

`y (dy)/(dx)`

Text Solution

Verified by Experts

The correct Answer is:
B
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