For Friday:

- Don’t forget badges and proof quiz are due Friday, on canvas.
- Today (Wed) we introduced induction! You may wish to revisit the video or read Hammack Chapter 10, to solidify the ideas.
- Try to prove that 1+2+3 +… + n = n(n+1)/2 by induction. We’ll do this, and more induction, on Friday.

## Professor Katherine Stange, Spring 2018