反比例函数y=2x+1/x-1怎么分解啊,..
y=(x+1)/(x+2) 可这样分解
=(x+2-1)/(x+2)
=-1/(x+2) +1
y=-1/x左移后得y=-1/(x+2)
但y=2x+1/x-1怎么分解呢？