2x-5<4x1

maxZ=2X1+4X2-5X3X1+X2+X3=72X1-3X2+X3≥10X1.X2.X3≥0maxZ=2X1+4X2-5X3X1+X2+X3=72X1-3X2+X3≥10X1.X2.X3≥0ma

矩阵线性方程组2x1-x2+3x3=33x1+x2-5x3=04x1-x2+x3=3x1+3x2-13x3=-6用消元法怎么计算呢.请需要帮助.矩阵线性方程组2x1-x2+3x3=33x1+x2-5x

2x1又2分之1x1有3分之1x1又4分之1x1又5分之1x...x1又2006分之1x1又2007分之1明天要交了,2x1又2分之1x1有3分之1x1又4分之1x1又5分之1x...x1又2006分

1x1\3+2x1\4+3x1\5+.+2006x1\2008的简便算法1x1\3+2x1\4+3x1\5+.+2006x1\2008的简便算法1x1\3+2x1\4+3x1\5+.+2006x1\2

1/2X1/3-1/3X1/4-1/4X1/5-1/5X1/6.1/39X1/401/2X1/3-1/3X1/4-1/4X1/5-1/5X1/6.1/39X1/401/2X1/3-1/3X1/4-1/

1/2X1/3-1/3X1/4-1/4X1/5-1/5X1/6.-1/39X1/401/2X1/3-1/3X1/4-1/4X1/5-1/5X1/6.-1/39X1/401/2X1/3-1/3X1/4-

已知x1、x2是方程2x²+3x-5=0的两根,则代数式x1^2+4x1+x2=已知x1、x2是方程2x²+3x-5=0的两根,则代数式x1^2+4x1+x2=已知x1、x2是方程

若x1x2是方程x^2+3x-5=0的两个根,则代数式x1^2+4x1+x2=?若x1x2是方程x^2+3x-5=0的两个根,则代数式x1^2+4x1+x2=?若x1x2是方程x^2+3x-5=0的两

幂函数f(x)=x^4/5,若0＜x1＜x2,则比较f《(x1+x2）/2》和《f(x1)+f(x2)》/2大小.==幂函数f(x)=x^4/5,若0＜x1＜x2,则比较f《(x1+x2）/2》和《f

怎么将x^4-(x1+x2)x^3+(x1*x2-2)x^2-(x1+x2)x+1因式分解?分解成（x^2-x1*x-1）*(x^2-x2-1)怎么将x^4-(x1+x2)x^3+(x1*x2-2)x

已知x1和x1是方程2x2-2x-5=0的两个实数根,求代数式x1^3+3X1^2+0.5X1+6X2已知x1和x1是方程2x2-2x-5=0的两个实数根,求代数式x1^3+3X1^2+0.5X1+6

(1/2005x1/2004x1/2003x...x1/3x1/2x1)^2005x(2005x2004x2003x...x3x2x1)^2005(1/2005x1/2004x1/2003x...x1

解线性方程组x1+2x2+3x3+4x4=52x1+4x2+4x3+6x4=8-x1-2x2-x3-2x4=-3解线性方程组x1+2x2+3x3+4x4=52x1+4x2+4x3+6x4=8-x1-2

x1+5x2+2x3-4x4=3-3x1-2x2+3x3+4x4=-6-x1+3x2-x3-4x4=-2-2x1+6x2+4x3+4x4=-52x1+13x2+3x3-12x4=4x是英文字母x1+5

求非齐次线性方程组2X1+7X2+3X3+X4=63X1+5X2+2X3+2X4=49X1+4X2+X3+7X4=2的通解求非齐次线性方程组2X1+7X2+3X3+X4=63X1+5X2+2X3+2X

求非齐次线性方程组2X1+7X2+3X3+X4=63X1+5X2+2X3+2X4=49X1+4X2+X3+7X4=2的通解求非齐次线性方程组2X1+7X2+3X3+X4=63X1+5X2+2X3+2X

非齐次线性方程组X1-5X2+2X3-3X4=115X1+3X2+6X3-X4=-12X1+4X2+2X3+X4=-6用导出组的基础解系表示通解非齐次线性方程组X1-5X2+2X3-3X4=115X1

求下列线性方程组的通解X1+2X2-X3+2X4=12X1+4X2+X3+X4=5-X1-2X2-2X3+X4=-4求下列线性方程组的通解X1+2X2-X3+2X4=12X1+4X2+X3+X4=5-

X1-2X2+3X3-X4=1；3X1-X2+5X3-3X4=4；2X1+X2+2X3-2X4=3；求解非齐次方程组,,X1-2X2+3X3-X4=1；3X1-X2+5X3-3X4=4；2X1+X2+

求非齐次线性方程组X1+X2+X3+X4=2;2X1+3X2-2X3-3X4=5;3X1+4X2-X3-2X4=7的全部解（用其特解与导出组的基础解基础解表示）求非齐次线性方程组X1+X2+X3+X4