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Jonirt1-Visitor
1-Visitor
June 13, 2019
Solved

This value must be a function, but has the form: any1.

  • June 13, 2019
  • 4 replies
  • 5337 views

Hi there,

 

I'm having problems with mathcad. I got a assignment in which the attached script was given.

For some reason it doesn't work though.

Any ideas?

 

 

Best answer by Werner_E

1) you can't write the differential operator d/dt  by hand - you have to use the menu/palette or the keyboard short

2) Your system seems to be setup wrong - there is no solution

4 replies

F
Fred_Kohlhepp23-Emerald I
23-Emerald I
June 13, 2019
@Jonirt wrote:

Hi there,

 

I'm having problems with mathcad. I got a assignment in which the attached script was given.

For some reason it doesn't work though.

Any ideas?

 

 

Well, I don't have Mathcad 15, when I open this in Smath it looks pretty lame.

 

Done in Prime 4 Express (so we can't write a solve block to do an odesolve,) see if this helps.

    W
    Werner_E25-Diamond IAnswer
    25-Diamond I
    June 13, 2019

    1) you can't write the differential operator d/dt  by hand - you have to use the menu/palette or the keyboard short

    2) Your system seems to be setup wrong - there is no solution

    J
    Jonirt1-VisitorAuthor
    1-Visitor
    June 13, 2019
    Ah okay,
    My instructor never clearly indicated that.
    Thanks for your response!
    -
    -MFra-21-Topaz II
    21-Topaz II
    June 13, 2019

    Hi Jonirt,

    To learn how to use MATHCAD 15, you should take a look at the tutorial:

    tutorial.jpg

    W
    Werner_E25-Diamond I
    25-Diamond I
    June 13, 2019

    Fred showed you your error in setting up the equation and also a nice way to do it without "odesolve".

     

    Here is the correct way to do it in the manner you tried and to other possibilities - all using odesolve (which unfortunately means "no units" in Mathcad 15):

    B1.PNG

    B2.PNG

    B3.PNG

     

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