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| Title: | Mathematics at DEC |
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| Moderator: | RUSURE::EDP |
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| Created: | Mon Feb 03 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2083 |
| Total number of notes: | 14613 |
2001.0. "Need calculus derivative" by LANDO::LACAVA () Thu Sep 21 1995 15:23
Can anybody help me with a simple derivative
What is the derivative of C(r) = [r]/[ln(r)] ??
I know there is some rule, trick, or shortcut, but can't think of
if off hand.
If you know, mail me at lando::lacava. Thanks.....
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2001.1 | | AUSSIE::GARSON | achtentachtig kacheltjes | Fri Sep 22 1995 03:45 | 16 |
| re .0
I'm not sure about your notation but perhaps the following helps.
d f(x) f'(x)g(x) - f(x)g'(x)
- ---- = ---------------------
dx g(x) (g(x))�
Hence
d x ln x - 1
- ---- = --------
dx ln x (ln x)�
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