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 Simple(?) Math Problem
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Posted on 02-23-09 2:17 PM     Reply [Subscribe]
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Some math problems to play with!

Please see below:

 

Last edited: 02-Mar-09 12:18 PM

 
Posted on 03-02-09 12:20 PM     Reply [Subscribe]
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[Update: Please do not work on this problem. I overlooked something, and now it's fixed. The premise of the question now is false, so do not attempt it!]

The following is the part of a bigger problem I am working on. At one point I've to integrate [5/(3*e^x - 2), x]. Upon integrating, I get the following solution:


 

integrate[5/(3*E^x - 2), x] ==
(-5*(x - Log[-2 + 3*E^x]))/2


However, is it not, by applying the basic mathematics rule, possible to manipulate the above function and get this rather simpler solution?

integrate[(5 * E^(-x))/((3*E^x - 2) *E^(-x)), x]==

(-5*(x - Log[-2 + 3*E^x]))/2

Last edited: 02-Mar-09 01:10 PM

 
Posted on 03-02-09 12:46 PM     Reply [Subscribe]
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what is the basic mathematics rule you are using to manipulate?

 
Posted on 03-02-09 12:52 PM     Reply [Subscribe]
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 How are you adding 2 in both denominator and numerator in the second line? I guess I am not getting your question because I know you can not make such a silly mistake...

 
Posted on 03-02-09 1:07 PM     Reply [Subscribe]
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Thanks, Marconi. I finally figured out my problem. When I run into messy problems like those, I simply do not see the simpler mistakes.


Thanks again. :)


 
Posted on 03-02-09 1:08 PM     Reply [Subscribe]
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I was wrong, F22! Thanks for looking into the problem. :)
 


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