计算:1/1x2+1/2X3+1/3x4+...+1/2009x2010
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计算:1/1x2+1/2X3+1/3x4+...+1/2009x2010计算:1/1x2+1/2X3+1/3x4+...+1/2009x2010计算:1/1x2+1/2X3+1/3x4+...+1/2
计算:1/1x2+1/2X3+1/3x4+...+1/2009x2010
计算:1/1x2+1/2X3+1/3x4+...+1/2009x2010
计算:1/1x2+1/2X3+1/3x4+...+1/2009x2010
1/1x2+1/2X3+1/3x4+...+1/2009x2010
=1-1/2+1/2-1/3+1/3-1/4+……+1/2009-1/2010
=1-1/2010
=2009/2010
=1-1/2+1/2-1/3+1/3-1/4....+1/2009-1/2010
=1-1/2010
=2009/2010
用克拉默法则解下列方程组 x1-2x2+3x3-4x4=4 x2-x3+x4=-3 x1+3x2+2x4=1 -7x2+3x3+x4=3x1-2x2+3x3-4x4=4x2-x3+x4=-3 x1+3x2+2x4=1 -7x2+3x3+x4=3
因式分解:x4+x3+2x2 +x+1
解方程组X1-2x2+3x3-x4=1,3x1-x2+5x3-3x4=2,2x1+x2+2x3-2x4=3
x1+5x2-x3-x4=-1x1-2x2+x3+3x4=33x1+8x2-x3+x4=1
写出方程组2*x1+x2-x3+x4=1,x1+2*x2+x3-x4=2,x1+x2+2*x3+x4=3的通解?
求非齐次线方程组的通解 :2x1+x2-x3+x4=1 x1+2x2+x3-x4=2 x1+x2+2x3+x4=3
具体写出方程组:2x1+x2-x3+x4=1;x1+2x2+x3-x4=2;x1+x2+2x3+x4=3的通解
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
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