How to read apostrophe in math [closed]
Solution 1:
Mathematician here. We pronounce f' as "f prime".
(Addendum: native English speaker in the United States. So, "we" refers to that group.)
From Wikipedia: "In mathematics, the prime is generally used to generate more variable names for things which are similar, without resorting to subscripts – x′ generally means something related to or derived from x."
https://en.wikipedia.org/wiki/Prime_%28symbol%29#Use_in_mathematics,_statistics,_and_science