写出下列方程组的解集并化简(1)x+y=5,xy=6 (2)y^2=2x+3,x^2=2y+3 (3)3x+2y+z=13,x+y+2z=7,2x+3y-z=12 (4)y+z=a,z+x=b,x+y=c
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![写出下列方程组的解集并化简(1)x+y=5,xy=6 (2)y^2=2x+3,x^2=2y+3 (3)3x+2y+z=13,x+y+2z=7,2x+3y-z=12 (4)y+z=a,z+x=b,x+y=c](/uploads/image/z/13337931-3-1.jpg?t=%E5%86%99%E5%87%BA%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%E7%BB%84%E7%9A%84%E8%A7%A3%E9%9B%86%E5%B9%B6%E5%8C%96%E7%AE%80%281%29x%2By%3D5%2Cxy%3D6+%282%29y%5E2%3D2x%2B3%2Cx%5E2%3D2y%2B3+%283%293x%2B2y%2Bz%3D13%2Cx%2By%2B2z%3D7%2C2x%2B3y-z%3D12+%284%29y%2Bz%3Da%2Cz%2Bx%3Db%2Cx%2By%3Dc)
写出下列方程组的解集并化简(1)x+y=5,xy=6 (2)y^2=2x+3,x^2=2y+3 (3)3x+2y+z=13,x+y+2z=7,2x+3y-z=12 (4)y+z=a,z+x=b,x+y=c
写出下列方程组的解集并化简
(1)x+y=5,xy=6 (2)y^2=2x+3,x^2=2y+3 (3)3x+2y+z=13,x+y+2z=7,2x+3y-z=12 (4)y+z=a,z+x=b,x+y=c
写出下列方程组的解集并化简(1)x+y=5,xy=6 (2)y^2=2x+3,x^2=2y+3 (3)3x+2y+z=13,x+y+2z=7,2x+3y-z=12 (4)y+z=a,z+x=b,x+y=c
A={(x,y)|x+y=5,xy=6}={(2,3)}; (2)B={(x,y)|y^2=2x+3,x^2=2y+3}={(-1,-1),(3,3)};
(3)C={(x,y,z)|3x+2y+z=13,x+y+2z=7,2x+3y-z=12}={(2,3,1)}
(4)D={(x,y,z)|y+z=a,z+x=b,x+y=c}={((b+c-a)/2,(a+c-b)/2,(a+b-c)/2)}
A={(x,y)|x+y=5,xy=6}={(2,3)}; (2)B={(x,y)|y^2=2x+3,x^2=2y+3}={(-1,-1),(3,3)};
(3)C={(x,y,z)|3x+2y+z=13,x+y+2z=7,2x+3y-z=12}={(2,3,1)}
(4)D={(x,y,z)|y+z=a,z+x=b,x+y=c}={((b+c-a)/2,(a+c-b)/2...
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A={(x,y)|x+y=5,xy=6}={(2,3)}; (2)B={(x,y)|y^2=2x+3,x^2=2y+3}={(-1,-1),(3,3)};
(3)C={(x,y,z)|3x+2y+z=13,x+y+2z=7,2x+3y-z=12}={(2,3,1)}
(4)D={(x,y,z)|y+z=a,z+x=b,x+y=c}={((b+c-a)/2,(a+c-b)/2,(a+b-c)/2)}
收起
这么多年了,也忘记差不多了呢