an algorithm question

From: Eitan (no_spam_please_at_nospam.com)
Date: 02/26/05 

Date: Sun, 27 Feb 2005 00:39:43 +0200

Hello,

Where can I find some good documentation about algorithm ?
For a specific question.
How can I prove that
(teta for latin letter teta - I cannot represent it in the email, so I will
write teta).
max(f(n), g(n)) = teta(f(n) + g(n)).

Thanks :)