Solving equations with pre-defined functions

Aleksander shared this question 4 years ago
Needs Answer

I have a function f(x) defined by FitExp.


Then in CAS, I want to Solve[f(x) = 100], but it gives the answer x=?.


b23d61b568c752e8dd41e8cbf2ed5370


How should I solve this equation?

Comments (4)

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Follow-up! It works fine if I don't restrict 0 <= x <= 50. But since the solution is within this interval, it's strange that it wouldn't find it.


This seems to be a bug, unless there's some use-case I'm missing.

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It works with this list. 2d740d5d61ec56cf1507e46e4a4079b6

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Very curious. Could it be a version difference between the Windows and OSX editions?

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But it did now work with your numbers in newest 5.0.352 on Mac. So there is something wrong.

M

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