实数x、y满足3x方4xy-y方=,求9X-5Y最大值

若两个正实数x,y满足x方+2xy-3y方=0,求x方+xy+y方除以x方-xy+y方的值若两个正实数x,y满足x方+2xy-3y方=0,求x方+xy+y方除以x方-xy+y方的值若两个正实数x,y满足x方+2xy-3y方=0,求x方+xy

实数X,Y满足(X-2)方+Y方=3求Y/X的最大值实数X,Y满足(X-2)方+Y方=3求Y/X的最大值实数X,Y满足(X-2)方+Y方=3求Y/X的最大值设k=y/xy=kx,这是过原点的直线则就是求过圆点的直线和圆有公共点是斜率的最大值

已知实数x,y满足方程3x+4y-10=0,求x方+y方的最小值已知实数x,y满足方程3x+4y-10=0,求x方+y方的最小值已知实数x,y满足方程3x+4y-10=0,求x方+y方的最小值∵3x+4y-10=0∴y=(10-3x)/4∴

已知实数xy满足x方+y方=1求y+2/x+1的取值范围已知实数xy满足x方+y方=1求y+2/x+1的取值范具体步骤啊...已知实数xy满足x方+y方=1求y+2/x+1的取值范围已知实数xy满足x方+y方=1求y+2/x+1的取值范具体

已知实数x,y满足x-y=2,x方+y方=4,求x,y的值已知实数x,y满足x-y=2,x方+y方=4,求x,y的值已知实数x,y满足x-y=2,x方+y方=4,求x,y的值x=y+2x^2+y^2=(y+2)^2+y^2=4,则y=0,x

已知实数X,Y满足2X方-4XY+4Y方-6X+9=0则X倍根号下8Y=已知实数X,Y满足2X方-4XY+4Y方-6X+9=0则X倍根号下8Y=已知实数X,Y满足2X方-4XY+4Y方-6X+9=0则X倍根号下8Y=2X方-4XY+4Y方-

已知x、y为实数且满足（x方+y方）（x方+y方-1）=12,求x方+y方的值已知x、y为实数且满足（x方+y方）（x方+y方-1）=12,求x方+y方的值已知x、y为实数且满足（x方+y方）（x方+y方-1）=12,求x方+y方的值（x&

已知实数xy满足（x方-y方）（x方-y方-1）=2,求x方+y方的值.已知实数xy满足（x方-y方）（x方-y方-1）=2,求x方+y方的值.已知实数xy满足（x方-y方）（x方-y方-1）=2,求x方+y方的值.具体求解过程详见图片哈!

关于指数对数函数9X方减8乘3X方减9=0若实数X,Y满足2X+Y=2,求4X方加2Y方的最小值关于指数对数函数9X方减8乘3X方减9=0若实数X,Y满足2X+Y=2,求4X方加2Y方的最小值关于指数对数函数9X方减8乘3X方减9=0若实数

如果实数x、y满足x方+y方=1,那么（1-xy)(1+xy)有（）A最小值3/4而无最大值B最大值1而无最小值C最小值1/2和最大值1D最小值3/4和最大值1、如果实数x、y满足x方+y方=1,那么（1-xy)(1+xy)有（）A最小值3

已知3X方-xy-4y方=0,求分式xy-3x方/2y方-5xy-3x方的值已知3X方-xy-4y方=0,求分式xy-3x方/2y方-5xy-3x方的值已知3X方-xy-4y方=0,求分式xy-3x方/2y方-5xy-3x方的值即(3x-4

已知实数x和y满足5x方-3xy+1/2y方-2x+1/2y+1/4=0求x与y的值已知实数x和y满足5x方-3xy+1/2y方-2x+1/2y+1/4=0求x与y的值已知实数x和y满足5x方-3xy+1/2y方-2x+1/2y+1/4=0

已知xy满足方程组｛x+2y=3,x-y=-2.求x/（x-y）平方乘以x方-y方/x+y+（2x+2/x-y）-2的值已知xy满足方程组｛x+2y=3,x-y=-2.求x/（x-y）平方乘以x方-y方/x+y+（2x+2/x-y）-2的值

已知xy满足x方+y方4分之5=2(x+y)求代数式x+y分之xy的值已知xy满足x方+y方+4分之5=2(x+y)求代数式x+y分之xy的值上面打错了已知xy满足x方+y方4分之5=2(x+y)求代数式x+y分之xy的值已知xy满足x方+

正数XY满足X方-Y方=2XY求X-Y/X+Y的值正数XY满足X方-Y方=2XY求X-Y/X+Y的值正数XY满足X方-Y方=2XY求X-Y/X+Y的值（x-y)/(x+y)=(x-y)(x+y)/[(x+y)^2]=(x^2-y^2)/[x

x,y∈正实数,xy方=4,求x+2y的最小值x,y∈正实数,xy方=4,求x+2y的最小值x,y∈正实数,xy方=4,求x+2y的最小值xy^2=4x+2y=x+y+y≥3三次根号（xy^2）＝3三次根号40X=-2Y=1xy^2=4x+

已知xy=8满足x方y-xy方-x+y=56.求x方+y方的值已知xy=8满足x方y-xy方-x+y=56.求x方+y方的值已知xy=8满足x方y-xy方-x+y=56.求x方+y方的值x方y-xy方-x+y=56xy(x-y)-x+y=5

已知x分之y=3,求6x方-3xy+7y方分之3x方-4xy+2y方的值已知x分之y=3,求6x方-3xy+7y方分之3x方-4xy+2y方的值已知x分之y=3,求6x方-3xy+7y方分之3x方-4xy+2y方的值∵y/x=3∴y=3x∴

求单项式2xy,6x方y方,-3xy,-4x方y方的和；求单项式2xy,6x方y方,-3xy,-4x方y方的和；求单项式2xy,6x方y方,-3xy,-4x方y方的和；2X方Y方-XY2x²y²-xy

已知x方*y方+x方+y方+1=4xy,求xy的值已知x方*y方+x方+y方+1=4xy,求xy的值已知x方*y方+x方+y方+1=4xy,求xy的值x^2*y^2+x^2+y^2+1=4xy==>x^2*y^2-2xy+1+x^2-2xy