Ответ:
Для того, чтобы найти координату точки С, середины отрезка АВ, нужно воспользоваться формулой средней точки: C = (A + B) / 2
1) A = 8/3, B = -10/3; C = (8/3 - 10/3) / 2 = -2/3 / 2 = -1/3
2) A = -2 1/2 = -5/2, B = 11/4; C = (-5/2 + 11/4) / 2 = ((-10 + 11)/4) / 2 = 1/4 / 2 = 1/8
3) A = 3/5, B = -1 3/5 = -8/5; C = (3/5 - 8/5) / 2 = -5/5 / 2 = -1 / 2 = -1/2
4) A = 6 3/8 = 51/8, B = -1,2 = -6/5; C = (51/8 - 6/5) / 2 = ((255 - 48)/40) / 2 = 207/40 / 2 = 207/80
5) A = 7/8, B = -4 2/3 = -14/3; C = (7/8 - 14/3) / 2 = ((21 - 112)/24) / 2 = -91/24 / 2 = -91/48
6) A = 5/6, B = -3,75 = -15/4; C = (5/6 - 15/4) / 2 = ((10 - 45)/12) / 2 = -35/12 / 2 = -35/24
7) A = 8 1/4 = 33/4, B = -5,6 = -28/5; C = (33/4 - 28/5) / 2 = ((165 - 112)/20) / 2 = 53/20 / 2 = 53/40
8) A = 0,125 = 1/8, B = -9/5; C = (1/8 - 9/5) / 2 = ((5 - 72)/40) / 2 = -67/40 / 2 = -67/80
9) A = 7/8, B = -6/7; C = (7/8 - 6/7) / 2 = ((49 - 48)/56) / 2 = 1/56 / 2 = 1/112
10) A = 7 5/6 = 47/6, B = -8,25 = -33/4; C = (47/6 - 33/4) / 2 = ((94 - 99)/12) / 2 = -5/12 / 2 = -5/24