Dave Wollenberg wrote: > Anything to the 0 power is 1. I've never been able to figure out why, but > it is. 1. sorry to get off the topic of ti83s here, but at least this is math related. 2. proof of (a^0) = 1. My logic should be pretty clear RTP: (a^0) = 1 a = a^1 = a^(1) = a^(0+1) = (a^0) * (a^1) a ----- = a^0 (a^1) 1 = (a^0) QED Chris