# How do you find the vertical asymptote of a logarithmic function?

##### 1 Answer

Oct 28, 2015

#### Answer:

The vertical asymptote is (are) at the zero(s) of the argument and at points where the argument increases without bound (goes to

#### Explanation:

Example

graph{y=ln(x^2-3x-4) [-5.18, 8.87, -4.09, 2.934]}

Example

graph{ln(1/x) [-5.18, 8.87, -4.09, 2.934]}

Example

graph{ln(1/x^2) [-5.18, 8.87, -4.09, 2.934]}