alleryHistorically, which letters were used for variables and constants?
AUpper-case letters
BLower-case letters
CDecimal digits
DPunctuation marks
Answer & Solution
Correct answer: B. Lower-case letters
1. Lower-case letters were used for variables and constants.
2. Upper-case letters stood for points in geometry.
3. Digits represent numbers, not variables.
_Source: Wikipedia, Glossary of mathematical symbols, lead section_
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