若实数x,y 满足 3 ·x2+2y2=6x,分别求X 和X2+Y2的取值范围
已知实数x,y满足x2+y2=4,求x+y的取值范围
设实数xy满足x2 +2y2=6,则x+y的取值范围
已知实数x,y满足x2+y2-4x+1=0,求2x+y的取值范围?
已知实数x,y满足:x2+3y2-3=0,求x+y的取值范围.
已知实数x,y满足x2+ y2=6x,则z=x2+y2+2x的取值范围
若实数x,y满足2x2+3y2=1,S=3x2-2y2,则S的取值范围是______.
已知实数x,y满足x2+2xy+3y2-8y+6=0,求x,y的取值范围
已知实数x.y满足(x2+y2)(x2+y2-1)=2,求x2+y2的值
已知实数x,y满足x2+y2-2x+2y=6求x2+y2的最值
已知实数XY 满足X2+Y2=1,求Y+2/X+1的取值范围
已知实数x,y满足x2+y2+4x+3=0,求(y-2)/(x-1)的取值范围.
已知实数x,y满足x2+y2+4x+3=0,求x-1分之y-2的取值范围