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A particle of unit mass undergoes one-di...

A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to `v(x)=beta x^(-2 n)` where `beta ` and n are constants and x is the position of the particle. The acceleration of the particle as a function of x, is given by

A

`-2n beta^2 x^-(2n-1)`

B

`-2n beta^2 x^-(4n-1)`

C

`-2n beta^2 x^-(2n+1)`

D

`-2n beta^2 e^-(4n+1)`

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