x=(1-y)/(2+y)
问题描述:
x=(1-y)/(2+y)
化成y=f(x)的形式
答
原式=x(2+y)=1+y 2x+xy=1-y 2x=1-y-xy 2x-1=-y-xy 2x-1=-(1-x)y y=-(2x-1)/(1-x)
x=(1-y)/(2+y)
化成y=f(x)的形式
原式=x(2+y)=1+y 2x+xy=1-y 2x=1-y-xy 2x-1=-y-xy 2x-1=-(1-x)y y=-(2x-1)/(1-x)