Т.к. BM - медиана, то точка M - это середина AC.
Xm = (Xa + Xc)/2 = (-3 + 1)/2 = -2/2 = -1
Ym = (Ya + Yc)/2 = (2 + 4)/2 = 6/2 = 3
Zm = (Za + Zc)/2 = (1 + 3)/2 = 4/2 = 2
M(-1; 3; 2)
BM² = (-1 - 1)² + (3-(-2))² + (2 - 0)² = 4 + 25 + 4 = 33
BM = √33
A)
112,113,114
Б) 3049, 3050, 3051, 3052, 3053, 3054, 3055, 3056, 3057, 3058, 3059, 3060 3061, 3062, 3063, 3064, 3065, 3066, 3067, 3068, 3069, 3070, 3071, 3072, 3073, 3074, 3075, 3076, 3077, 3078, 3079, 3080
В) 1996, 1995, 1994, 1993, 1992, 1991