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Displacment x of a particle at time t is...

Displacment x of a particle at time t is given by `x=At^(2)+Bt+C`, where A,B,Care constants .If v is its velocity, then :`4Ax-v^(2)=`

A

`4AC+B^(2)`

B

`4AC-B^(2)`

C

`2AC-B^(2)`

D

`2AC+B^(2)`

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The correct Answer is:
B
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