例2用克拉默法则解方程组 3x1+5x2+2x3+x4=3, 3x2+4x4=4, x1+x2+x3+x4=116, x1-x2-3x3+2x4=5/6 352 解D= 0304 =67≠0, 1111 1-1-32 上页例2 用克拉默法则解方程组        − − + = + + + = + = + + + = 3 2 5 6. 11 6, 3 4 4, 3 5 2 3, 1 2 3 4 1 2 3 4 2 4 1 2 3 4 x x x x x x x x x x x x x x 解 1 1 3 2 1 1 1 1 0 3 0 4 3 5 2 1 − − D = = 67  0