x√x+x√y)/(xy-y2)-(x+√xy+y)/(x√x-y√y)化简
来源:学生作业帮 编辑:大师作文网作业帮 分类:综合作业 时间:2024/11/13 00:59:18
x√x+x√y)/(xy-y2)-(x+√xy+y)/(x√x-y√y)化简
希望大家帮下忙 .
请把中间过程写完整......
希望大家帮下忙 .
请把中间过程写完整......
令x^1/2=z,y^1/2=w,
原式=(z^3+z^2w)/(z^2w^2-w^4)-(z^2+zw+w^2)/(z^3-w^3)
=(z^3+z^2w-w^3-w^2z)/(z^2w^2-w^4)
=[(z^3-w^3)+(z^2w-w^2z)]/(z^2w^2-w^4)
=(z^2+2zw+w^2)(z-w)/w^2(z-w)(z+w)
=(z+w)/w^2
=(√x+√y)/y
原式=(z^3+z^2w)/(z^2w^2-w^4)-(z^2+zw+w^2)/(z^3-w^3)
=(z^3+z^2w-w^3-w^2z)/(z^2w^2-w^4)
=[(z^3-w^3)+(z^2w-w^2z)]/(z^2w^2-w^4)
=(z^2+2zw+w^2)(z-w)/w^2(z-w)(z+w)
=(z+w)/w^2
=(√x+√y)/y
(√xy -xy分之x+√xy)除以√xy -y分之x-y(x>0,y.0)
化简:(x+y)÷(√x-√y)-2xy÷(x√y-y√x)
帮个忙啦 已知x+y=-6 xy=8 求√y/x+√x/y
√x(√x+2√y)=√y(6√x+5√y,求x-3√xy+2y/x+√xy-6y
√xy+y分之一+√xy+x分之一等于多少,
√xy/x+√xy/y怎么算
已知y=√(x-8)+√(8-x)+18,求代数式 (x+y)/(√x-√y)-2xy/(x√x-y√x) 的值
先化简再求值(6x√y/x +3/y*√xy^3)-(4x√x/y +√36xy) 已知X=3/2,y=27
解方程xy'=(√x^2-y^2)+y
x²/xy-x/y
xy-1+x-y
将(√x-y)/(x-y)÷√(xy/x³-x²y)(x>y>0)化简