4 2 -13 -1 211 3 0r3-3r1,r1-r21 3 -33 -1 2-1 -3 3r2-3r1,r3+r11 3 -30 -10 110 0 0方程组有解,需化成行简化梯矩阵r2*(-1/10),r1-3r21 0 3/100 1 -11/100 0 0通解为:c(3,-11,-10),c为任意常数...