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• Topic:

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The relation between time and distance is $t=\alpha {x}^{2}+\beta x$, where α and β are constants. The retardation is

(1) $2\alpha {v}^{3}$

(2) $2\beta {v}^{3}$

(3) $2\alpha \beta {v}^{3}$

(4) $2{\beta }^{2}{v}^{3}$