s(t)=²-3t²+2t (a) Find the velocity function of the particle at any time t 2 0. v()-21-61 (b) Identify the time intervals on which the particle is moving in a positive direction. (Enter your answer using interval notation.) x (c) Identify the time intervals on which the particle is moving in a negative direction. (Enter your answer using interval notation.) (d) Identify the time(s) at which the particle changes direction. (Enter your answers as a comma-separated list.) tH Need Help? Read

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