Mathematics

Problem

For a particle, displacement varies with time as

x = 4t^{2} - 2t + 1

(metres). Determine the instantaneous velocity at

t = 3\,\text{s}

. a)

24\,\text{m s}^{-1}

22\,\text{m s}^{-1}

10\,\text{m s}^{-1}

-22\,\text{m s}^{-1}