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A particle of unit mass is moving along ...

A particle of unit mass is moving along x-axis. The velocity of particle varies with position x as v(x). `=alphax^-beta` (where `alpha` and `beta` are positive constants and `x>0` ). The acceleration of the particle as a function of x is given as

A

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

B

`-alpha^2betax^-(2beta-1)`

C

`-alpha^2betax^-(2beta+1)`

D

`-alpha^2betax^-(beta+1)`

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