대답: # "설명보기"# 설명: #a = {dv} / dt # # => v = int a (t) dt # # = 16t ^ 3 + t ^ 2 + 6t + C # # v (0) = v_0 = -3 => C = -3 # # => v = 16 t ^ 3 + t ^ 2 + 6 t - 3 # #v = {ds} / dt "(v = 속도) # # => s = int v (t) dt # # = 4 t ^ 4 + t ^ 3 / 3 + 3 t ^ 2 - 3 t + C # #s (0) = s_0 = 1 => C = 1 # (t) = 4 t ^ 4 + t ^ 3 / 3 + 3 t ^ 2 - 3 t + 1 #