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8-Gravel

## a name is required here

1 ACCEPTED SOLUTION

Accepted Solutions
23-Emerald III
(To:JPark61)
15 REPLIES 15
23-Emerald III
(To:JPark61)

You should NOT use global assignments ( = ), but boolean equality to define the equations in your solve block. Type [CTRL =] to get those. They show as a bold equals sign ( = ).

Success!
Luc

8-Gravel
(To:LucMeekes)

24-Ruby V
(To:JPark61)

1) You have to only use the function names without the argument parenthesis (use "C" and not "C(t)")

2) You have only 5 equations but 6 functions to solve for.

8-Gravel
(To:Werner_E)

I attached new pic.

21-Topaz II
(To:JPark61)

Hi,

8-Gravel
(To:-MFra-)

Thank you, can you attached file please?

8-Gravel
(To:-MFra-)

and why is f(t):0.5*cosh(t)??

21-Topaz II
(To:JPark61)

Hi,

you should provide the f (t); what I chose is a convenience function. I do not believe that Mathcad is able to determine f (t) as an unknown knowing only its initial condition.

8-Gravel
(To:-MFra-)

thank you

but the answer is below the attached file.

Do you know why?

21-Topaz II
(To:JPark61)

Hi,

If there were a further differential equation in f(t), things would change. See the following example:

8-Gravel
(To:-MFra-)

can you send me a file?

21-Topaz II
(To:JPark61)

I've attached the file.

23-Emerald III
(To:JPark61)

That very blurry picture shows a graph with only 4 traces. That's 4 functions, not 6.

Are you sure you have entered the complete set of ODE's, required for solving the 6 functions that you are trying to find?

Luc

8-Gravel
(To:LucMeekes)

I attached new pic.