A={(x,y)|2x+y=1,x,y是实数}
A={(x,y)|2x+y=1,x,y是实数}
(1/2)已知实数x,y,a满足:根号(x+y-8)+根号(8-x-y)=根号(3x-y-a)+根号(x-2y+a+3)
x,y是正实数,用柯西不等式证明:x^2/(y^2+y*x)+y^2/(x^2+y*x)>=1
实数X.Y满足X*X+Y*Y-2X-2Y+1=0,则(Y-4)/(X-2)的取值范围是?
已知实数x,y,满足x-√x-1=√y+3-y,则x+y最大值是?
已知x,y是实数,向量a,b不共线,若(x+y-1)a+(x-y)b=0,则x=?y=?
已知正实数x,y满足x+2y=4,则1x+1y
已知正实数x,y .1/x+2/y=1,则x+y的最小值
已知实数x、y、a满足:x+y-8+8-x-y=3x-y-a+x-2y+a+3
已知实数x,y满足(x+y)^2=1,(x-y)^2=25,求x,y的值
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y
设x,y是实数.若4x^2+y^2+xy=1,则2x+y的最大值