**TI89**statsProgram file 02/25/05, 19:47RinterpolZ9Q =-yi  y=-yi -zvx1 vy1yi;Q =-xi  x=-xi z-z vy1 vx1xi ;vy1vy2 vx1vx2 sy2vy2sx2vx2sy1vy1sx1vx1Z: y-x-Vous cherchez :-Lsy2 y2=-Csx2 x2=-Csy1 y1=-Csx1 x1=-CVous connaissez x1,y1,x2,y2-bpar F.Bertholon Nov 99-V  vy2vy1vx2vx1sy2sy1sx2sx1}pas d'argumentѷ