已知x,y满足x^2/16+y^2/25=1,则y-x的最大值为____,最小值为___

椭圆的几何性质已知x、y满足条件x^2/16+y^2/25 已知实数x.y满足(x+2)^2+y^2( 已知圆x,y满足x^2+y^2 已知x,y满足x^2+y^2-6x+8y+25=0,求y^x的值 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2 已知实数xy满足x+2y 已知实数xy满足 x+y-2 已知x,y满足y 已知x,y满足x+y-2>=0,2x-y+2>=0,x 已知x,y满足约束条件：x-y+1>=0,x+y-2>=0,x 已知x.y满足X2-y2=2xy.则x-y/x+y=?x. 已知xy满足约束条件y=2 2X+y 已知x=3y+2,且满足4y 已知x=3y+2,且满足4y 已知实数x,y满足不等式组：2x-y=0,x+2y 已知实数x,y满足约束条件:x>=2 y>=2 x+y 已知正整数x,y满足2^x+49=y^2,则x=,y=?