ตอบ: # "ดูคำอธิบาย" # คำอธิบาย: #a = {dv} / dt # # => v = int a (t) dt # # = 16 t ^ 3 + t ^ 2 + 6 t + C # #v (0) = v_0 = -3 => C = -3 # # => v = 16 t ^ 3 + t ^ 2 + 6 t - 3 # #v = {ds} / dt "(v = velocity) # # => s = int v (t) dt # # = 4 t ^ 4 + t ^ 3/3 + 3 t ^ 2 - 3 t + C # #s (0) = s_0 = 1 => C = 1 # # => s (t) = 4 t ^ 4 + t ^ 3/3 + 3 t ^ 2 - 3 t + 1 #