已知变量x,y满足(x+1)(y+1)=x+y,则.
1个回答
(x+1)(y+1)=x+y
xy+x+y+1=x+y
y=-1/x
所以选A
相关问题
已知变量满足约束条件 x+y≥1 x-y≤1 y≤a x≥0
已知变量x满足约束条件1:x-y+2=1;3:x+y-7
已知变量x y满足约束条件{x-y+2≤0;x≥1;2x+y-8≤0,则y/x的取值范围是
已知x、y满足y=√(x-1)+√(1-x)+2,则√y分之√x=?
已知有理数x、y满足(x²+y²+2)(x²+y²-1)=0 ,则x²
已知有理数x、y满足(x²+y²+2)(x²+y²-1)=0,则x²+
设变量x,y满足约束条件x-y>=-1,x+y>=1,3x-y
已知变量x,y满足(3x+y)²-(3x-y)²+24,则x,y是否成反比例?请说明理由
已知有理数xy满足(x²+y²)(x²+y²-1)-6=0,则x²+y
已知实数x y满足x2+y2=1则y-x范围