已知x、y是实数,且满足(x+4)2+|y-1|=0,则x+y的值是______.
已知x、y是实数,且满足(x+4)2+|y-1|=0,则x+y的值是______.
已知实数xy满足x/y=x-y,且y>1,则实数x的取值范围是
已知实数x,y,满足xy=1,且x>2y>0,则(x^2+4y^2)/(x-2y)的最小值是?
已知x是实数,y是纯虚数,且满足(2x-1)+i=y-(3-y)i,求x与y的值.
实数X.Y满足X*X+Y*Y-2X-2Y+1=0,则(Y-4)/(X-2)的取值范围是?
已知x,y是实数,且满足(x^2+y^2)(x^2+y^2+1)=12.求x^2+y^2的值
已知实数x,y满足|2x+y+1|≤|x+2y+2|,且-1≤y≤1,则z=2x+y的最大值是______.
已知非负实数x、y同时满足2x+y-4≤0,x+y-1≥0,则z=x2+(y+2)2的最小值是______.
已知实数x,y满足条件x≥0,y≥x,3x+4y≤12,则(x+2y+3)/(x +1)的最大值是
已知实数x,y满足x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
已知正实数x,y满足xy+2x+y=4,则x+y的最小值为______.
已知x是实数,y是纯虚数,且满足(2x-1)+(3-y)i=y-i,求x,y.