Hello, a question on my homework is in this form:

f(x) = 1/X about Xo = 3. (Xo is x naught, btw)

I'm confused what "about x naught" means, because the form I've been shown in class is about a, aka, the series:

Sum from 0 to infinity of Cn(X-a)^n

is called a power series about. Does x naught take the place of a, or do I use it to find the first term (since the power n would be 0) and therefore the c value, or some other way?

If you know what my prof means by this it would be wonderful.

Thank you