Question: The position function of a particle is given by r(t) = (-5t?, -4t, 12 - 1t). At what time is the speed of the particle

The position function of a particle is given by r(t) =

(-5t?, -4t, 12 - 1t). At what time is the speed of

The position function of a particle is given by r(t) = (-5t?, -4t, 12 - 1t). At what time is the speed of the particle at a minimum? t =

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