Simon really, really likes Excel iirc.
I was expecting to see “whose derivative is f(x)” instead of “whose differential coefficient is f(x). Is this use of "differential coefficient” common usage?
The text is old, so this fits with the comment “is what is now called its https://en.wikipedia.org/wiki/Derivative\|derivative” . Thanks!
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I do too. Then again, I also have an Accounting degree :smile:
Cool! I had never seen this term and I love to know elements of the history of mathematics. Thanks for sharing! I still don’t know what these words share a radical with “difference”. What’s differential about the derivative?
In case anyone wants a holiday brain teaser: https://www.gchq.gov.uk/news/christmas-card-2020