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franz32
Nov24-03, 07:22 AM
Hello guys!

I'm new here! Well, it feels like this forum is cool and interesting!

Can anyone help me here? =)

How do you prove the quotient theorem using the limit definition?
(Given a limit of f of x as x approaches a is A and a limit of g of x as x approaces a is B).

StephenPrivitera
Nov24-03, 02:31 PM
\begin{equation*}\begin{split}
\lim_{h\rightarrow 0} \frac {\frac {f(x+h)} {g(x+h)} - \frac {f(x)} {g(x)}} {h}
&= \lim_{h\rightarrow 0} \frac {f(x+h)g(x) - f(x)g(x+h)} {hg(x+h)g(x)} \\
&= \lim_{h\rightarrow 0} \frac {f(x+h)g(x) - f(x)g(x) + f(x)g(x) - f(x)g(x+h)} {hg(x+h)g(x)}
\end{split}\end{equation*}

You can take it from here. Be careful. How do you know
\lim_{h\rightarrow0} g(x+h)=g(x)?

franz32
Nov25-03, 09:39 AM
Hello. =)

Well, I think I can take it from here. If I have doubts,

I would probably want to clarify it.

Anyway, thank you very much! [:D]