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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2005
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Q)

The displacement x of a particle varies with time$x=ae^{-\alpha t}+be^{\beta t}$, where $a,b,\alpha$ and $\beta$ are positive constants. The velocity of the particle will -


( A ) Go on increasing with time
( B ) Drop to zero when ? = ?
( C ) Go on decreasing with time
( D ) Be independent of ? and ?

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