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

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...

全部展开

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