x²+y²-8x-10y+41=0
(x²-8x+16)+(y²-10x+25)=0
(x-4)²+(y-5)²=0
∴x-4=0,y-5=0
∴x=4,y=5
∴x/y-y/x
=4/5-5/4
=16/20-25/20
=-9/20
已知x²+y²-8x-10y+41=0,则x/y-y/x的值为
已知x²+y²-8x-10y+41=0,则x/y-y/x的值为
数学人气:476 ℃时间:2020-02-04 10:32:33
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