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The displacement of the particle varies ...

The displacement of the particle varies with time according to the relation `x=(k)/(b)[1-e^(-bt)]` . Then the velocity of the particle is

A

v = K exp (–bt)

B

`v = (k)/(b) exp (-bt)`

C

` v= (K^(2))/(b) exp (-bt)`

D

` v= (K^(2))/(b^(2)) exp (-bt)`

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The correct Answer is:
A
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