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The displacement (in meters) of a particle moving in a straight line is given by s = 7+3 - 8t + 11, where t is

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The displacement (in meters) of a particle moving in a straight line is given by s = 7+3 - 8t + 11, where t is measured in seconds. Find the velocity of the particle at the times given. Velocity at time t = 1 : Velocity at time t = 2 : Velocity at time t = 3 : Velocity at time t = a

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