1/x+1/y=2,求2x-xy+2y/3x+5xy+3y的值
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1/x+1/y=2,求2x-xy+2y/3x+5xy+3y的值1/x+1/y=2,求2x-xy+2y/3x+5xy+3y的值1/x+1/y=2,求2x-xy+2y/3x+5xy+3y的值1/x+1/y
1/x+1/y=2,求2x-xy+2y/3x+5xy+3y的值
1/x+1/y=2,求2x-xy+2y/3x+5xy+3y的值
1/x+1/y=2,求2x-xy+2y/3x+5xy+3y的值
1/x+1/y=2,推出x+y=2xy
2x-xy+2y/3x+5xy+3y
=[2(x+y)-xy]/3(x+y)+5xy]
=3xy/11xy=3/11
2x-xy+2y/3x+5xy+3y
=（2/x+2/y-1）/(3/x+3/y+5)
=(4-1)/(6+5)
=3/11