Question: A particle moving along a line has position s(t) = t 4 18t 2 m at time t seconds. At which times does the

A particle moving along a line has position s(t) = t⁴ − 18t²m at time t seconds. At which times does the particle pass through the origin? At which times is the particle instantaneously motionless (i.e., it has zero velocity)?

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