Réponses

2014-10-05T16:53:26+02:00
1) K((-1+3)/2, (-5/3 - 2)/2)  =  K (1, -11/6)
2) PQSR un parallélogramme donc 

PQ = SR

Xr - Xs = Xq - Xp  =  -3  - 2  = -1-Xs   donc Xs = 4

Yr - Ys = Yq - Yp  =    -2 - Ys  =  -5/3 + 6   donc Ys = -2 - 7/6 = -19/6