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Student Support Forum: 'Solving Log Equations' topicStudent Support Forum > General > "Solving Log Equations"

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buffer
09/01/04 10:39pm

Hi, I am trying to solve an equation involving Log[]. Heres the input and output

In[1]:=
Solve[2 Log[a, x] - Log[a, (x-1)] == Log[a, (x-2)],x]

Out[1]=
{}

What wrong am I doing? Is it a problem with framing the question(like eliminating logs and then trying to solve) or the inability of Mathematica to solve such equations?

Also, when I try to simplify:

In[2]:=
Simplify[ Log[a, x^2]\ + 3 Log[a, x] + 2 Log[a, 4 x]])

Out[2]=
(5Log[x] + Log[16 x^2])/Log[a]

instead of Log with base a of (x^3/16)

Please Help.

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Subject (listing for 'Solving Log Equations')
Author Date Posted
Solving Log Equations buffer 09/01/04 10:39pm
Re: Solving Log Equations Andrew DuBui... 10/21/04 5:14pm
Re: Solving Log Equations Paul Stysley 10/27/04 1:46pm
Re: Solving Log Equations KENZOU 10/30/04 5:38pm
Re: Solving Log Equations yehuda ben-s... 10/31/04 00:23am
Re: Solving Log Equations Henry Lamb 10/31/04 11:52pm
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