若实数x,y满足 x+y=3,x^2+y^2=7,求x^5+y^5的值

若实数x,y满足约束条件x-y-2=0,2y-3 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 若实数x,y满足不等式组x>=0 ,y>=0,x+2y 若正实数x.y满足x+y=xy,则x+2y的最小值 已知实数x,y满足y=|x-1|若x+2y 实数x.y满足(x-2(平方)+y(平方)=3则y/x的最大值? 实数x.y满足(x-2(平方)+y(平方)=3则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 若实数X,Y同时满足3x+2y=7和2x+3y=3,求x+y/x-y 若实数x,y满足y 若实数x,y满足不等式y 若实数x,y满足不等式x-y>=-1,x+y>=1,3x-y 若实数x,y满足不等式x-y>=-1,x+y>=1,3x-y 设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y 实数x,y满足2x+5y>=0,2x-3y>=-6,2x+y 若实数x,y满足x²+y²-2x+4y=0,求x-y的最大值 若实数x y满足（x+y)²+（x+y)-2=0则x+y值为 设正实数x,y满足x^3+y^3=x-y,求证：x^2+4y^2