ex1求解下列方程组 x1+2x,+3x3+3x4+7r=0 3x1+2x2+x3+x4-3x5=0 2+2x3+2x4+6x5=0 5x1+4x2+3x3+3x4-x5=0 Solution 2337 23 3211-3 1000 4-8-8-24 5433-1 6-12-12-36 K图心ex1. 求解下列方程组        + + + − = + + + = + + + − = + + + + = 5 4 3 3 0 2 2 6 0 3 2 3 0 2 3 3 7 0 1 2 3 4 5 2 3 4 5 1 2 3 4 5 1 2 3 4 5 x x x x x x x x x x x x x x x x x x x Solution.             − − = 5 4 3 3 1 0 1 2 2 6 3 2 1 1 3 1 2 3 3 7  A             − − − − − − − − → 0 6 12 12 36 0 1 2 2 6 0 4 8 8 24 1 2 3 3 7