结构图纸中:JLL2(2) 250X600 1G-200X3 1U-100X3@200 1Y-100X3 M10@200
因式分解(1+x+x2+x3)2-x3
若(x3+1xx
实数xy满足1< x3/y
因式分解:x3+(y-1)x2-2xy-y2
谁会用MATLAB遗传算法求函数y=(x2+1)/x1+x3^2*x2+x3^2+x3*x2的极小值
解方程组X1+X2+X3=0,2X2-X3=1,X1-X2+2X3=-1.
2x3-3x+三分之二x3-2x-三分之四x3+x-1,其中x=-二分之一
1+2x4-(x2+2x3)
X1+2X2-X3+X4=1
因式分解x3-x2-x-1
求线性方程组 x2-x3-x4=0 x1+x2-x3+3x4=1 x1-x2+x3+5x4=-1 x1+2x2-2x3+
求非齐次线性方程组:2x1-x2+4x3-3x4=-4;x1+x3-x4=-3;3x1+x2+x3=1;7x1+7x3-