Question

y=x/x-1的图像怎么画

Answer 1

y=(x-1+1)/(x-1)
=(x-1)/(x-1)+1/(x-1)
=1+1/(x-1)
y-1=1/(x-1)
左加右减,下加上减
所以把y=1/x向右移1个单位,向上移1个单位