Thread: logarithms and graphs??

how do I find the domain, x-intercept, and vertical asymptote of a log function?

example: f(x)= log x
7

Originally Posted by jillybean

how do I find the domain, x-intercept, and vertical asymptote of a log function?

example: f(x)= log x
7

I assume you mean,


The domain are all positives.
Thus, .

The vertical asymptote in a standard logarithm is the point where the domain breaks, i.e. .

The x-intercept is to solve,

Thus,