若x,y 满足条件{x>=1 y>=1 x+y-3
若变量x,y满足约束条件{x>=-1;y>=x;3x+2y
已知实数x,y满足条件{2x-y+1≥0,2x+y≥0,x≤1,求z=x+3y的最小值.
x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y
若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y=
当x,y满足条件x>=0,y
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
若实数x,y满足x-y+1>=0,x+y>=0,x
若实数x,y满足x-y+1》=0,x+y>=0,x
若对满足条件x+y+3=xy(x>0,y>0)的任意x,y,(x+y)2-a(x+y)+1≥0恒成立,则实数a的取值范围
设变量xy满足 x+y-3 x-y+1 3x-y+5 z=x+y/x
已知【x+y】/【2x+2y】=x+y/2x+2y=1/2 则x,y满足的条件是 A |x+y|>0 B m-3/m+1
若x,y满足条件2x-y≥0,2x+3y≤8,y≥0,则z=x+3y的最大值为