# Find Where Undefined/Discontinuous f(x)=(x-1)/(x^2-x)

Set the denominator in equal to to find where the expression is undefined.
Solve for .
Factor out of .
Factor out of .
Factor out of .
Factor out of .
If any individual factor on the left side of the equation is equal to , the entire expression will be equal to .
Set the first factor equal to .
Set the next factor equal to and solve.
Set the next factor equal to .
Add to both sides of the equation.
The final solution is all the values that make true.
The equation is undefined where the denominator equals , the argument of a square root is less than , or the argument of a logarithm is less than or equal to .
Find Where Undefined/Discontinuous f(x)=(x-1)/(x^2-x)