# All Questions

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### Entering a system of differential equations [closed]

while trying to solve a the following system of differntial equations i ran in to some trouble. I browsed the web and this site to find out how to enter this but I could not manage to get it to work. ...
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### Missing V9 Menu: File -> New -> FreeCDF

I can run CDFs fine, and can export Notebooks as CDFs. But the File -> New menu does not contain a FreeCDF option, just the ...
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### How to fit exponential function which is not converging

I performed an experiment where I measured diffusion in a lipid bilayer. I performed the measurement by fluorescently labeling some molecules in the bilayer, and the irradiating them with light ...
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### How can I get the functionality of a command ReplaceAllList?

I'm trying to use ReplaceList to match subexpressions. I expected the command: ReplaceList[{p, {p, p}}, {x_, y_} -> x y] to output two results, equivalent to: ...