(x+y-1)-xy=0的函数怎么画

问题描述:

(x+y-1)-xy=0的函数怎么画

变下形:(x+y-1)-xy=0==>x+y-1-xy=0==>x-1+y(1-x)=0 y=(x-1)/(1-x)=-1 x≠1