25x=2000 80y=2000求xy分之x+y的值,
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25x=200080y=2000求xy分之x+y的值,25x=200080y=2000求xy分之x+y的值,25x=200080y=2000求xy分之x+y的值,25x=200080y=2000则1/
25x=2000 80y=2000求xy分之x+y的值,
25x=2000 80y=2000求xy分之x+y的值,
25x=2000 80y=2000求xy分之x+y的值,
25x=2000 80y=2000
则1/x=25/2000 1/y=80/2000
所以(x+y)/(xy)=1/x+1/y=25/2000+80/2000
=105/2000
=21/400
25X=2000
X=80
80Y=2000
Y=25
XY=80*25=2000
X+Y=80+25=105
25x=2000 80y=2000
两个式子相乘
2000xy=2000*2000
xy=2000
xy分之x+y
=(2000/25+2000/80)/2000
=1/25+1/80
=(80+25)/2000
=21/400
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