Harry_the_cat
Elite Member
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- Mar 16, 2016
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I just responded to another post with:
This got me thinking. How do you remember mathematical rules? What little tricks do you use?
SOHCAHTOA is another common example.
Here's the way I remember, and encourage my students to remember, the quotient rule:
If \(\displaystyle y=\frac{u}{v}\) then \(\displaystyle y′=\frac{vu′−uv′}{v^2}\).
Note the "superscripts" on the v's ... they increase as you write the RHS out (no superscript on first v, 1( actually ' ) superscript on second v, 2 superscript on last v). And you've got to remember a minus sign on the top.
This got me thinking. How do you remember mathematical rules? What little tricks do you use?
SOHCAHTOA is another common example.