The Freshman's Product Rule (f⋅g)' = f'⋅g' is true only if f/f' + g/g' = 1pic.twitter.com/6eHFtV7BwI
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But f' = g' =0, so your condition can't be written as it is.
Right, so perhaps I should have said any "non constant" function.
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Yes, as your condition rewritten is, of course, just the statement that fg' + f'g = f'g'. Thus, your condition is a way of looking for non-trivial solutions.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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