r t1 t2 r t2-t1, t1 t2 t1 : t2, r2 r1 1+a t2-t1, t1 2/t2 2 r1 3/r2 3, t2 t1 p2/p1, t 1-r 2, v1 / t1 v2 / t2, t1 + v1 t2 + v2, t t1+t2, what is t0 t1 t2, t1/t2 p1/p2, t1/t2/t3, 1-t2/t1, p1/t1 p2/t2, p2/p1 t2/t1, t n1+n2-2, v1/v2 t1/t2, t 2/r 3, q1/t1 q2/t2, t1r2/t1r3
r t1 t2 r t2-t1. There are any references about r t1 t2 r t2-t1 in here. you can look below.