A particle is moving along x -axis with its position (x) varying with time (t) as x=α t^4+β t^2+γ t+δ. The ratio of its initial velocity to its…

A particle is moving along $\displaystyle x$-axis with its position $\displaystyle (x)$ varying with time $\displaystyle (t)$ as $\displaystyle x=\alpha t^4+\beta t^2+\gamma t+\delta$. The ratio of its initial velocity to its initial acceleration, respectively, is: