math: clarify what a constant is

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eggy 2020-11-03 14:36:51 -05:00
parent 0c2e2a7b6a
commit 74dabe18ad

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@ -542,7 +542,7 @@ When solving for questions that ask for rate of change related to other rates of
- variables are defined
- equations are written in terms of derivates
- the equations are differentiated **with respect to time**
- apply derivative rules (especially the chain rule) to every variable that is not a constant
- apply derivative rules (especially the chain rule) to every variable that is not a constant (i.e., that changes with respect to time)
- substitute values only at the end
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