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(a) If s = 2t^(3)+ 3t^(2) + 2t + 8 then...

(a) If ` s = 2t^(3)+ 3t^(2) + 2t + 8` then find time at which acceleration is zero.
(b) Velocity of a particle (starting at t =0) varies with time as v= 4t. Calculate the displacement of part between t = 2 to t = 4 s

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