1.25x3.6+1.25x3.4+1.25简便运算怎么做
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1.25x3.6+1.25x3.4+1.25简便运算怎么做
1.25x3.6+1.25x3.4+1.25简便运算怎么做
1.25x3.6+1.25x3.4+1.25简便运算怎么做
1.25x(3.6+3.4+1)=1.25x8=10
1.25*(3.6+3.4+1)
1.25(3.6+3.4+1)=1.25*8=10
1.25x3.6+1.25x3.4+1.25简便运算怎么做
6x3
1.证明(8-7x-6x2+x3)+(x3+5x2+4x-1)-(-x2-3x+2x3-3)的值与x无关.快,
1.25X0.25X3.2简便方法
1.25X0.25X3.2简算
x4-x3-5x2-6x-4
分解因式x3-4x2+x+6
x3-7x+6
X3 +5X -6
x3+5x-6
因式分解:4X-X3
x2>4是x3
解方程组x1+x2=4,x2+x3=-6,x3+x1=2
简便计算3.3x3.4+3.4x3.5+3.5x3.6+3.6x3.7简便计算1 .3.3x3.4+3.4x3.5+3.5x3.6+3.6x3.7 2.1/21+1/30+1/42+1/56+1/72+1/90 3.19/24x85+109x5/24
求下面线性规划问题的对偶问题minZ- -x1+3x2-5x3-2x1+6x2-x3≥30X1+4x2-3x3≤20X1-x2+x3- -4X1≤0,x2≥0,x3 无约束
写出下面线性规划的对偶规划min Z=3X1+2X2+X3; X1+X2+X3≤6;X1-X3≥4;X2-X3≥3;X1,X2,X3≥0
用初等行变换来解下列线性方程组(1)2x1-x2+3x3=3 3x1+x2-5x3=0 4x1-x2+x3=3 x1+3x2-13x3=-6(2) x1-2x2+x3+x4=1 x1-2x2+x3-x4=-1 x1-2x2+x3-5x4=5(3) x1-x2+x3-x4=1 x1-x2-x3+x4=0 x1-x2-2x3+2x4=-1/2
x3+x+2 x3-4x2-4x-5 因式分解