  Rank: Advanced Member Groups: Registered
Joined: 10/12/2009(UTC) Posts: 248   Location: Cali, Colombia Was thanked: 87 time(s) in 66 post(s)
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Here is a problem I found trying to solve a simple engineering question.  Please see attached file:  Problem with solvers.sm (91kb) downloaded 11 time(s).Edited by user 20 September 2023 21:56:52(UTC)
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 Rank: Advanced Member Groups: Registered
Joined: 23/07/2013(UTC) Posts: 1,128  Was thanked: 509 time(s) in 339 post(s)
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Sorry I don't have maxima. Equations are solved with FindRoot(). I also had to make some alterations. Original y(x) function has unit mismatch. Solvers don't like direct usage of if() or cases(). You can detect it with Unknowns(). If it doesn't produce a result, there is a problem. Here is your file solved. Regards Problem with solvers_solved.sm (96kb) downloaded 12 time(s).
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 5 users thanked overlord for this useful post.
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on 19/09/2023(UTC), on 19/09/2023(UTC), on 19/09/2023(UTC), on 19/09/2023(UTC), on 19/09/2023(UTC)
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Rank: Advanced Member Groups: Registered
Joined: 23/07/2013(UTC) Posts: 1,128 Was thanked: 509 time(s) in 339 post(s)
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I assumed C.1 and C.2 has same units. Maybe I was wrong at that conclusion. Worksheet below find a solution between 4-6. This may be the correct result. Sorry if I made a huge mistake. Regards Problem with solvers_revisited.sm (106kb) downloaded 10 time(s). Edited by user 20 September 2023 02:56:38(UTC)
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2 users thanked overlord for this useful post.
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on 20/09/2023(UTC), on 20/09/2023(UTC)
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Rank: Advanced Member Groups: Registered
Joined: 10/12/2009(UTC) Posts: 248 Location: Cali, Colombia Was thanked: 87 time(s) in 66 post(s)
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Perfect! Thanks for your cooperation!
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