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数学
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已知x^2+y^2-6x-8y+25=0,求x分之y-y分之x
人气:471 ℃ 时间:2020-06-18 10:38:43
解答
x^2+y^2-6x-8y+25=0
(x-3)^2+(y-4)^2=0
x=3,y=4
y/x-x/y
=4/3-3/4
=7/12
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