# What is the equation of the line normal to  f(x)=xln(x^3-x) at  x=1?

Apr 30, 2016

I am not sure you can have it. The function is not defined at $x = 1$!

#### Explanation:

At $x = 1$ you have $\ln 0$...!

Graphically:
graph{xln(x^3-x) [-18.02, 18.03, -9.01, 9.01]}