# How do you find the domain of f(x) = ln (10-x)?

Apr 30, 2016

domain is $\left(- \infty , 10\right)$

#### Explanation:

Domain of f(x) would be all values of x along the number line, except at those points where f(x) does not exist.

Accordingly, in this case f(x) does not exist for $x \ge 10$

Hence domain is $\left(- \infty , 10\right)$