PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
[parent] Viewing Message
``Re: limit rule of compound function'' by azdbacks4234 on 2008-01-26 16:19:44
I'm super busy with classes right now, but in the next week or so I might be able to add a proof, although I think it would be more beneficial to drop the assumption that g be continuous at $a$ and assume only that \lim_{x\rightarrow a}g(x) exists. In this case, we have

\lim_{x\rightarrow x_0}g(f(x))=\lim_{x\rightarrow a}g(x),

which implies the result as currently stated, since in this case

\lim_{x\rightarrow a}g(x)=g(a)=g(\lim_{x\rightarrow x_0}f(x)). Just a suggestion though.
[ reply | up | top ]
Interact
reply