A point moves with uniform acceleration and v1, v2, and v3 denote the average velocities in the three successive intervals of time t1, t2 and t3. Which of the following relations is correct ?

Suppose u be the initial velocity. Velocity after time t1 :v11=u+ at   Velocity after time t1+t2  : v22=u+at1+t2  Velocity after time t1+t2+t3:v33=u+at1+t2+t3  Now,  v1=u+v112=u+u+at12=u+12at1 v2=v11+v222=u+at1+12at2  v3=v22+v332=u+at1+at2+12at3  So  v1-v2=-12at1+t2 v2-v3=-12at2+t3 v1-v2:(v2-v3)=t1+t2:t2+t3