S(t) = 2t² - 3t³ + 5t
V(t) = S'(t) = 2(t²)' - 3(t³)' + 5(t)' = 4t - 9t² + 5
V(3) = 4 * 3 - 9 * 3² + 5 = 12 - 81 + 5 = - 64
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S(t) = 2t² - 3t³ + 5t
V(t) = S'(t) = 2(t²)' - 3(t³)' + 5(t)' = 4t - 9t² + 5
V(3) = 4 * 3 - 9 * 3² + 5 = 12 - 81 + 5 = - 64