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A relation between time t and distance x...

A relation between time t and distance x is ` t= alpha x^2 + beta x` where `alpha` and `beta` are constants. The retardation is

A

`-2 alpha v^3`

B

`2 beta v^3`

C

`2 alpha beta v^3`

D

`2 beta^2 v^3`

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The correct Answer is:
A
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