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Algebraic manipulation of diferential equation

ptc-649666
1-Newbie

Algebraic manipulation of diferential equation



I�ve got a logistic equation. To evaluate it in respect to an exponential solution it needs some algebraic manipulation. MathCAD will do this for me of course but it won�t show all the stages of the manipulation and just for once I wanted to check the stages. And guess what I seem to have developed a mental block.

Can anyone give me an idea as to the protocol why a +1/p is chosen.

The actual workings attached

2 REPLIES 2

Attach the work sheet, it will help.

There are several "Logistic models".

jmG

On 7/13/2009 4:44:03 PM, Shipwright wrote:
>
>
>I�ve got a logistic equation.
>To evaluate it in respect to
>an exponential solution it
>needs some algebraic
>manipulation. MathCAD will do
>this for me of course but it
>won�t show all the stages of
>the manipulation and just for
>once I wanted to check the
>stages. And guess what I seem
>to have developed a mental
>block.
>
>Can anyone give me an idea as
>to the protocol why a +1/p is
>chosen.
>
>The actual workings attached
>____________________________

If you want to see the stages of solving that particular unknown (because unseen) "Logistic DE", that you can do pencil+paper. Mathcad 11 and lower versions have different symbolic engine than your 14 version, that's one thing. The second is about the solving step that are not necessary in book style and of which the steps in coding are surely not available.

Visit the PTC library, you might find "Cobweb" and "Logistic map".

jmG
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