MathCastle
CalculusEasyParametric, Polar and Vector-Valued Functions

Parametric, Polar and Vector-Valued Functions · Easy problem

A particle has position r(t)=⟨t2−1,  3t⟩\mathbf{r}(t)=\langle t^2-1,\;3t\rangle. Find its speed at t=2t=2.