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A particle moves in a straight line and...

A particle moves in a straight line and its position x at time t is given by `x^(2)=2+t`. Its acceleration is given by :-

A

`(-2)/(x^(3))`

B

`-(1)/(4x^(3))`

C

`-(1)/(4x^(2))`

D

`(1)/(x^(2))`

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The correct Answer is:
B
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