Question 42690
Anything divided by zero is undefined.
{{{f(x)= 1/(x-1)}}}
Look at the denominator. (x - 1) can not equal zero.
x - 1 = 0
x = 1 is excluded from your domain
{{{ graph( 600, 600, -10, 10, -10, 10, 1/(x-1) ) }}}