说明：X^2表示X的平方.1.∵（X+Y-1)^2 ≥0且√2X-Y+4≥0又∵（X+Y-1)^2=-√2X-Y+4∴只有（X+Y-1)^2=√2X-Y+4=0时成立∴X+Y-1=0,2X-Y+4=0解得X=-1 ,Y=2∴Y^X=1/2,∴它的负倒数=-22.由已知,X^2-Y^2=1得1+Y^2=X^2 ,X^2-...
说明：X^2表示X的平方.1.∵（X+Y-1)^2 ≥0且√2X-Y+4≥0又∵（X+Y-1)^2=-√2X-Y+4∴只有（X+Y-1)^2=√2X-Y+4=0时成立∴X+Y-1=0,2X-Y+4=0解得X=-1 ,Y=2∴Y^X=1/2,∴它的负倒数=-22.由已知,X^2-Y^2=1得1+Y^2=X^2 ,X^2-...