(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)(2)(3x^2/4y)^2乘以2y/3x+ x
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/18 03:19:51
(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)(2)(3x^2/4y)^2乘以2y/3x+ x^2/2y^2除以2y^2/x
(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)
=(x+2y)/(x+y)*xy/(x+2y)/[(x+y)/(xy)]
=xy/(x+y)*xy/(x+y)
=(xy)^2/(x+y)^2
(3x^2/4y)^2乘以2y/3x+ x^2/2y^2除以2y^2/x
=9x^4/16y^2*2y/3x+x^2/2y^2*x/2y^2
=3x^3/8y+x^3/4y^4
=(3x^3y^3+2x^3)/8y^4
=(x+2y)/(x+y)*xy/(x+2y)/[(x+y)/(xy)]
=xy/(x+y)*xy/(x+y)
=(xy)^2/(x+y)^2
(3x^2/4y)^2乘以2y/3x+ x^2/2y^2除以2y^2/x
=9x^4/16y^2*2y/3x+x^2/2y^2*x/2y^2
=3x^3/8y+x^3/4y^4
=(3x^3y^3+2x^3)/8y^4
(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)(2)(3x^2/4y)^2乘以2y/3x+ x
(xy-x^2)乘以(xy)/(x-y)
计算[3x分之2-(x+y分之2)乘以[3x分之x+(y-x^2-xy)]除以x分之x-y
(x-y)^0除以(x-y)^-3乘以(y-x)^-2
化简(x-y)^3乘以(y-x)^2为
已知x=2+根号3,y=2-根号3,计算代数式(x+y/x-y-x-y/x+y)乘以(1/x^2-1/y^2)
1、x(x-y)(x+y)-x(x+y)^2
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
(xy-x²)除以xy分之x²-2xy+y²乘以x²分之x-y
已知x+y=6,xy=-2,求(x^4-y^4)除以x^2+y^2/xy乘以(6x+6y)的值.
【(x-y)^2+(x+y)(x-y)】除以 2x
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1