Is it true that L'hopital stole his famous rule from his tutor Johann Bernoulli?
If you have access of a library that has bound copies of The Mathematics Teacher, this is written about at length in the April 1963 issue pp257-60.
For a summery of that piece can be found on page 207 of In Mathematical Circles by Howard Eves.
I asked a simple question.
Why are you pointing me to books?
Here's a simple answer . . . Yes.
If you are not going to verify my claim
. . (by maybe ... um ... reading a book),
. . you must take my word for it.