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Nataly_S1-Visitor
1-Visitor
November 14, 2022
Solved

How to find Symbolic solution of a system of linear equations with specific accuracy

  • November 14, 2022
  • 2 replies
  • 1989 views

Screenshot_138.png

Hello.
Could someone help me, please, with this task? An error while trying to find Symbolic solution of a system of linear equations with specific accuracy. What I should do make it done?

Best answer by LucMeekes

You should definitely attach your worksheet, because this simply works:

LucMeekes_0-1668459380299.png

The other thing is: Why do you insist on a symbolic solution for a pure numerical problem?

LucMeekes_1-1668459506759.png

The symbolic problem would be:

LucMeekes_0-1668459778076.png

LucMeekes_1-1668459788283.png

with as solution:

LucMeekes_2-1668459810684.png

(That's not a grey line, but a very long expression, zoomed out)

The four individual answers are:

LucMeekes_1-1668460064077.png

 

Success!
Luc

 

2 replies

W
Werner_E25-Diamond I
25-Diamond I
November 14, 2022

Always additionally attach the worksheet itself.

Chances are that at least one of the variables you solve for was already assigned a value before. Try typing w:=w, etc. before trying to symbolically solve.

    N
    Nataly_S1-VisitorAuthor
    1-Visitor
    November 22, 2022

    Thank you.

    L
    LucMeekes23-Emerald IVAnswer
    23-Emerald IV
    November 14, 2022

    You should definitely attach your worksheet, because this simply works:

    LucMeekes_0-1668459380299.png

    The other thing is: Why do you insist on a symbolic solution for a pure numerical problem?

    LucMeekes_1-1668459506759.png

    The symbolic problem would be:

    LucMeekes_0-1668459778076.png

    LucMeekes_1-1668459788283.png

    with as solution:

    LucMeekes_2-1668459810684.png

    (That's not a grey line, but a very long expression, zoomed out)

    The four individual answers are:

    LucMeekes_1-1668460064077.png

     

    Success!
    Luc

     

      N
      Nataly_S1-VisitorAuthor
      1-Visitor
      November 22, 2022

      Thank you. I opened new document and made copy past all equation and finally it works. I don't know why it was not worked on previous worksheet. Maybe because I have several worksheet pages (I made laboratory tasks).

      W
      Werner_E25-Diamond I
      25-Diamond I
      November 22, 2022
      @Nataly_S wrote:

      Thank you. I opened new document and made copy past all equation and finally it works. I don't know why it was not worked on previous worksheet. Maybe because I have several worksheet pages (I made laboratory tasks).

      As already written I guess that in your original sheet you already had assigned a value to one of the variables w, x, y or z. In this case the symbolics throws the error shown in your pic. Solution is to make this variable unknown to the symbolic engine again by typing w:=w  x:=x, etc.

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