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The equation of motioj of a partucle is given by s(t)= t^3 -6t^2 +9t where s...

The equation of motioj of a partucle is given by s(t)= t^3 -6t^2 +9t where s is in meters and t is in seconds.
a) Find when the particle is moving in the negatuve direction
b) Find when the particle is accelerating in the positive direction
Math   Calculus   
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