Re: Derivative help
- To: mathgroup at smc.vnet.net
- Subject: [mg39152] Re: Derivative help
- From: "Chris Rodgers" <christopher.rodgers at st-johns.oxford.ac.uk>
- Date: Fri, 31 Jan 2003 19:56:57 -0500 (EST)
- Organization: Oxford University, England
- References: <b1dg35$7ar$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Try this: f=Log[x]^x D[f,x] On my Mathematica, it produces: Log[x]^x*(Log[x]^(-1) + Log[Log[x]]) HTH Chris Rodgers St John's College http://rodgers.org.uk/ > Hi, all. I'm new to Mathematica. I went to the help section for my > question but it only further confused me. I'm basically trying to take the > first derivative of (ln(x))^x. Here is my syntax: f = (ln(x))^x. But then > when I evaluate f ', it says nothing but ((ln(x))^x)' which is nothing new. > Is this because I didn't specify bounds and that the function may be > discontinuous over the default bounds in Mathematica? > > Thanks > >