1 因为s1=V0t+at^2 2 s2=V0*2t+a*(2t)^2 2-V0t-at^2 2 =V0t+3at^2 2 s3=3V0t+9at^2 2-2V0t-4at^2 2=V0t+5at^2 2 sn-1=(n-1)V0t+(