A particle moving for has velocity

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

A particle moving for t≥0t\ge 0 has velocity v(t)=3e−t−1v(t)=3e^{-t}-1. Determine the time, if any, at which the particle changes direction.

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