解: 系数矩阵= 2 1 3 5 -5 1 1 1 4 -3 3 1 5 6 -7 r1-2r2,r3-3r2 0 -1 1 -3 1 1 1 1 4 -3 0 -2 2 -6 2 r2+r1,
x1+5x2+2x3-4x4=3 -3x1-2x2+3x3+4x4=-6 -x1+3x2-x3-4x4=-2 -2x1+
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相关问题
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解线性方程组x1+x2+3x3+4x4=5 2x1+4x2+4x3+6x4=8 -x1-2x2-x3-2x4=-3
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3-2(x-1)=4(-2x+3),2-(3x-4)=-4x,2(x-2)-6(x-1)=3(1-x)
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线性方程组为:x1-x2-5x3+4x4=2 2x1-x2+3x3-x4=1 3x1-2x2-2x3+3x4=3 7x1
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3(x+2)/x-3+ x+3/x-2=4 1/x+1 + 2x/x+1=2 5x/x+2 + 3/x^2+4x+4=5
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4/5x+2=-1/3x-1.-5/6x+2=-1/3x-1.6(x-4)=-3(4+2x).
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6(x+1)=4(x+4) 6(x-1)=4(3-2x) 5-3x=8-4x 5-(x+3)=4-3x 1/2(x+6)
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1x2=1/3(1x2x3=0x1x2 ) 2x3=1/3(2x3x4-1x2x3) 3x4=1/3(3x4x5- 2x
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1x2=1|3(1x2x3-0x1x2) 2x3=1|3(2x3x4-1x2x3) 3x4=1|3(3x4x5-2x3x
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求非其次线性方程组 x1+x2+2x3-x4=1;2X1+3X2+X3-2X4=4;3X1+4X2+3X3-3X4=5的
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2【4/3x-(2/3x-1/2)】=3/4x (x+4)/0.2-(x-3)/0.5=-1.6 1/2【x-1/2(x