9.1 Sets and Counting

Union and Intersection
http://www.youtube.com/watch?v=En8fI2ixepo

8.4 Induction

Example
http://www.youtube.com/watch?v=IFqna5F0kW8

Example
http://www.youtube.com/watch?v=uHfwNKWyD20&feature=relmfu

Example
http://www.youtube.com/watch?v=wBvsIyQN4o8

8.3 Geometric Sequences

Intro
http://www.youtube.com/watch?v=C7tE26CDI2M

Formula for nth term
http://www.youtube.com/watch?v=IGFQXInm-co&feature=relmfu

Infinite sum and repeating decimals
http://www.youtube.com/watch?v=7GNTz2CbPYs

http://www.youtube.com/watch?v=nDm74LdP54w

8.2 Arithmetic Sequences

Intro
http://www.youtube.com/watch?v=ZtPsWriHwa8

Formula for nth term
http://www.youtube.com/watch?v=lj_X9JVSF8k

Finding the Sum of an arithmetic sequence
http://www.youtube.com/watch?v=UHkueFmPC6s

8.1 Sequences

Sequences
http://www.youtube.com/watch?v=Kxh7yJC9Jr0

Summation Notation
http://www.youtube.com/watch?v=hEPk36Yncxg

Factorial
http://www.youtube.com/watch?v=4j66DS_XTSo

7.5 Partial Fraction Decomposition

http://www.youtube.com/watch?v=7cgOf3alK40

http://www.youtube.com/watch?v=9AXr7dIr0Ng

7.1 Systems of Equations

Substitution
http://www.youtube.com/watch?v=cwHR_B9zK7k

Elimination
http://www.youtube.com/watch?v=ej25myhYcSg&feature=relmfu

Three Variables!
http://www.youtube.com/watch?v=aPKz7011lAA&feature=relmfu