I see that the usual proof of de l'Hospital theorem involves the mean value theorem and is carried on in a case-by-case fashion.
Could you point out some other proofs of de l'Hospital that are impressive because of their subtlety and elegance?
I see that the usual proof of de l'Hospital theorem involves the mean value theorem and is carried on in a case-by-case fashion.
Could you point out some other proofs of de l'Hospital that are impressive because of their subtlety and elegance?
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