已知x>0,y>0,(根号x)×(根号x+2倍根号y)=(根号y)×(6倍根号x+5倍根号y),求 x+根号xy-y ——————— 2x+根号xy+3y 晕,凑会着看吧,具体一点
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![已知x>0,y>0,(根号x)×(根号x+2倍根号y)=(根号y)×(6倍根号x+5倍根号y),求 x+根号xy-y ——————— 2x+根号xy+3y 晕,凑会着看吧,具体一点](/uploads/image/z/5283853-61-3.jpg?t=%E5%B7%B2%E7%9F%A5x%3E0%2Cy%3E0%2C%EF%BC%88%E6%A0%B9%E5%8F%B7x%EF%BC%89%C3%97%EF%BC%88%E6%A0%B9%E5%8F%B7x%EF%BC%8B2%E5%80%8D%E6%A0%B9%E5%8F%B7y%EF%BC%89%EF%BC%9D%EF%BC%88%E6%A0%B9%E5%8F%B7y%EF%BC%89%C3%97%EF%BC%886%E5%80%8D%E6%A0%B9%E5%8F%B7x%EF%BC%8B5%E5%80%8D%E6%A0%B9%E5%8F%B7y%EF%BC%89%2C%E6%B1%82+x%EF%BC%8B%E6%A0%B9%E5%8F%B7xy%EF%BC%8Dy+%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94%E2%80%94+2x%EF%BC%8B%E6%A0%B9%E5%8F%B7xy%EF%BC%8B3y+%E6%99%95%2C%E5%87%91%E4%BC%9A%E7%9D%80%E7%9C%8B%E5%90%A7%2C%E5%85%B7%E4%BD%93%E4%B8%80%E7%82%B9)
已知x>0,y>0,(根号x)×(根号x+2倍根号y)=(根号y)×(6倍根号x+5倍根号y),求 x+根号xy-y ——————— 2x+根号xy+3y 晕,凑会着看吧,具体一点
已知x>0,y>0,(根号x)×(根号x+2倍根号y)=(根号y)×(6倍根号x+5倍根号y),求 x+根号xy-y
———————
2x+根号xy+3y
晕,凑会着看吧,
具体一点
已知x>0,y>0,(根号x)×(根号x+2倍根号y)=(根号y)×(6倍根号x+5倍根号y),求 x+根号xy-y ——————— 2x+根号xy+3y 晕,凑会着看吧,具体一点
原方程可化减为
(根x+根y)(根x-5根y)=0
根x-5根y=0
将x=5根y
带入得:
x+根号xy-y =29y
2x+根号xy+3y =58y
所以
原式=29y/58y=1/2