Asymptotic Behaviors



Dear All,
I am not that much into maxima, so perhaps I am asking a trivial question.
I know that maxima can be used e.g. to calculate the limits of a 
function e.g. lim f(x) when x--> infinity.
However, sometimes you simply have a complicated function which can be 
expressed as something asymptotically much simpler when e.g. x is large.
To fix the ideas, consider f(x)=sqrt(x^2+10).
Now, I would simply be able to guess, using maxima, that f(x) goes like 
x for x>>1. How can I do that? Should I resort to a Taylor expansion in 
such cases?
Many thanks

Lorenzo