Question

Помогите решить матрицу пожалуйста (1.5 и 2.5)

Answer 1

 2.5 Решения    
C1,1 = (A1,1) * (B1,1) + (A1,2) * (B2,1) + (A1,3) * (B3,1) = 3 * 0 + 1 * 2 + 02 * 3 = 0 + 2 + 6 = 8
C1,2 = (A1,1) * (B1,2) + (A1,2) * (B2,2) + (A1,3) * (B3,2) = 3 * (-1) + 1 * 1 + 02 * 7 = (-3) + 1 + 14 = 12
C1,3 = (A1,1) * (B1,3) + (A1,2) * (B2,3) + (A1,3) * (B3,3) = 3 * 2 + 1 * 1 + 02 * 1 = 6 + 1 + 2 = 9
C2,1 = (A2,1) * (B1,1) + (A2,2) * (B2,1) + (A2,3) * (B3,1) = (-1) * 0 + 0 * 2 + 02 * 3 = 0 + 0 + 6 = 6
C2,2 = (A2,1) * (B1,2) + (A2,2) * (B2,2) + (A2,3) * (B3,2) = (-1) * (-1) + 0 * 1 + 02 * 7 
C2,3 = (A2,1) * (B1,3) + (A2,2) * (B2,3) + (A2,3) * (B3,3) = (-1) * 2 + 0 * 1 + 02 * 1 = (-2) + 0 + 2 = 0
C3,1 = (A3,1) * (B1,1) + (A3,2) * (B2,1) + (A3,3) * (B3,1) = 1 * 0 + 2 * 2 + 1 * 3 = 0 + 4 + 3 = 7
C3,2 = (A3,1) * (B1,2) + (A3,2) * (B2,2) + (A3,3) * (B3,2) = 1 * (-1) + 2 * 1 + 1 * 7 = (-1) + 2 + 7 = 8
C3,3 = (A3,1) * (B1,3) + (A3,2) * (B2,3) + (A3,3) * (B3,3) = 1 * 2 + 2 * 1 + 1 * 1 = 2 + 2 + 1 = 5 
Ответ    
      8  12   9
С= 6  15   0
      7  8    5