Zero & Negative Exponents
Sources
Stapel, Elizabeth. "Negative Exponents." Purplemath. Available from http://www.purplemath.com/modules/exponent2.htm. Accessed 26 August 2010
Gloag, Andrew & Anne. "Exponential Functions."http://www.ck12.org/
flexr/chapter/4478 (accessed August 31, 2010)
Holt, Rinehart, & Winston. "Exponents and Roots." http://my.hrw.com/
math06_07/nsmedia/homework_help/msm3/msm3_ch04_02_homeworkhelp.html (accessed September 1, 2010).