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If P.E. of a system is given by relation...

If P.E. of a system is given by relation `U= (A)/(x^(2))-(B)/(x)`, where 'A'and'B' are positive constant, then the mean positive of S.H.M.is

A

`x=(A)/(B)`

B

`x=(B)/(A)`

C

`x= (B)/(2A)`

D

`x= (2A)/(B)`

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