Re: how to simplify Log[E^(2/3 x^(3/2))] ?
- To: MATHGROUP at yoda.physics.unc.edu
- Subject: Re: how to simplify Log[E^(2/3 x^(3/2))] ?
- From: keiper (Jerry Keiper)
- Date: Tue, 19 Apr 1994 09:24:21 -0500
> Can somebody tell me why
> Log[y E^(2/3 x^(3/2))]
> cannot be simplified by using Simplify[]?
It isn't clear what you want it to simplify to, but I might guess
that you are looking for (2/3 x^(3/2)) Log[y]. The simple
answer is that it doesn't simply to (2/3 x^(3/2)) Log[y] because
it isn't true:
In[1]:= {Log[y E^(2/3 x^(3/2))], (2/3 x^(3/2)) Log[y]}
3/2 3/2
(2 x )/3 2 x Log[y]
Out[1]= {Log[E y], -------------}
3
In[2]:= % /. {x -> -7.0, y -> 1}
Out[2]= {0. + 0.219531 I, 0}
Jerry B. Keiper
keiper at wri.com
Wolfram Research, Inc.