Monday, April 27, 2009
The Original Super Hero
When we do derivatives and integrals of "e" to the x, I always call "e" the original super hero because whether you integrate it, or differentiate it, you always come back to the same function. It's corny, but it helps the kids remember.
Last week, we were doing a problem in which involved an "e" and I mentioned the super hero story again, when a girl had trouble picking the part of the integral to use for the "u" in her substitution. Calc Boy then yelled out "Ln is e's Kryptonite." Everyone laughed, but I laughed so hard I had tears running down my face. For those of you who don't know the math and are still bothering to read this post, e to the lnx, is x, thus the e is destroyed.
I couldn't believe this boy made the connection. I can't believe the crazy affect I am having on them. This is a kid I will miss.