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by tomp
4455 days ago
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> Sure it does, because if that is the case, you restrict your domain when you divide by a variable expression. If you divide both sides by x-1, then you effectively rule out 1 from the domain.
> That's the problem. That's the problem that a mathematician must handle. The solution to the equation x * f(x) = x
is very simple: x is either 0 or such that f(x) = 1. |
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