若实数x,y满足2x²+3y²=1,S=3x²-2y²,则S的取值范围是
若实数x,y满足2x²+3y²=1,S=3x²-2y²,则S的取值范围是
若实数xy满足2x²+3y²=1,S=3x²-2y²,则S的取值范围是
若实数x,y满足2x*X+3y*y=1,S=3x*x-2y*y,则S的取值范围为
若实数x、y满足2x^2+3y^2=1,s=3x^2-2y^2,则S的取值范围是
若实数x,y满足2x²+3y²=1,S=3x²-2y²,则S的取值范围是多少
若实数x、y满足条件x²-y²=1,则(1/x²)+(2y/x)的取值范围是?
若实数X Y满足y=2x+1,且x小于等于2y大于等于3,则y/x的取值范围是 ?
已知实数X,Y满足X²+Y²+4X+3=0,求Y-2/X-1的取值范围.
若实数xy满足4^x+4^y=2^(x+1)+2^(y+1)则s=2^x+2^y的取值范围
已知实数XY 满足方程X^2+Y^2+4X+3=0 则S=(X-1)^2+(Y+3)^2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______.
实数x,y满足x+y≤2,(x-1)²+(y-1)²≤2,则2x+y的取值范围是