-5-[-5+(1-2x3/5)÷(-2)]计算
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![-5-[-5+(1-2x3/5)÷(-2)]计算](/uploads/image/z/11961196-52-6.jpg?t=-5-%5B-5%2B%281-2x3%2F5%29%C3%B7%28-2%29%5D%E8%AE%A1%E7%AE%97)
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-5-[-5+(1-2x3/5)÷(-2)]计算
-5-[-5+(1-2x3/5)÷(-2)]计算
-5-[-5+(1-2x3/5)÷(-2)]计算
-0.1
(5^4x3^3-5^3x3^2+5^2x3)÷15=?
设x=(1-√5)÷2则√(x3-1÷x3)x3就是x³
1+2x3-4÷5=
(-5)x3又3分之1+2x3又3分之1+(-6)x3又3分之1
x3+x+2 x3-4x2-4x-5 因式分解
-5-[-5+(1-2x3/5)÷(-2)]计算
-3-[-5+(1-0.2x3/5)÷(-2)]计算
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
{2X1-X2+3X3=33X1+X2-5X3=04X1-X2+X3=3X1+3X2-13X3=-6{X1-2X2+3X3-4X4=4X2-X3+X4=-3X1+3X2-3X4=1-7X2+3X3+X4=-3
解下列线性方程组 x1+2x2+3x3=1 2x1+2x2+5x3=2 3x1+5x2+x3=3
求解非齐次线性方程组x1-2x2+x3+x4=1,x1-2x2+x3-x4=-1,x1-2x2+x3-5x4=5的解
用初等行变换解线性方程组 x1-2x2+x3+x4=1 x1-2x2+x3-x4=-1 x1-2x2+x3-5x4=5
求解线性方程组-x1+x2+2x3=1;x1-x2+x3=2;5x1-5x2-4x3=1
解方程组X1-2x2+3x3-x4=1,3x1-x2+5x3-3x4=2,2x1+x2+2x3-2x4=3
解一道方程组x1+x2+x3=5,x2+x3+x4=1,x3+x4+x5=-5,x4+x5+x1=-3,x5+x1+x2=2
x1+5x2-x3-x4=-1x1-2x2+x3+3x4=33x1+8x2-x3+x4=1
1.证明(8-7x-6x2+x3)+(x3+5x2+4x-1)-(-x2-3x+2x3-3)的值与x无关.快,
求证:无论X取何值下列(8-7X-6X2+X3)+(X3+5X2+4X-1)-(-X2-3X+2X3-3)结果不变