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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 constant 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^(-4n-1)`

B

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

C

`2nbeta^(2)x^(-4n+1)`

D

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

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