Re: combining Log[] terms
- To: mathgroup at smc.vnet.net
- Subject: [mg30494] Re: [mg30482] combining Log[] terms
- From: BobHanlon at aol.com
- Date: Fri, 24 Aug 2001 04:05:53 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 2001/8/23 2:24:57 AM, nbock at acsu.buffalo.edu writes: >Is there a function that combines terms like > >Log[a] - Log[b] > >to > >Log[a/b]? > >I couldn't find anything so far in the documentation regarding the >Log[] function, only some references to Collect[], which does >something similar to what I want for powers of a given expression. > Use a rule Log[a] - Log[b]; % /. Log[y_] - Log[z_] -> Log[y/z] Log[a/b] %//PowerExpand Log[a] - Log[b] Bob Hanlon Chantilly, VA USA