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Algebra 2/Trigonometry‎ > ‎

4)Sequences & Series

Formulas to remember: 
Arithmetic Sequence (an){a_n} = {a_1} + (n - 1)d
Arithmetic Series (Sn){S_n} = \frac{n}{2}\left( {{a_1} + {a_n}} \right)
 Geometric Sequence (An){a_n} = {a_1}\left( {{r^{n - 1}}} \right)
Geometric Series (Sn){S_n} = \frac{{{a_1}\left( {1 - {r^n}} \right)}}{{1 - r}}

1)Arithmetic Sequences
2)Arithmetic Sequences (finding a1, n, d)
3)Sigma Notation
4)Arithmetic Series
5)Geometric Sequences
6)Geometric Series
7)Infinite & Recursive Sequences

Looking for more extra help?  Try the following
links:
Arithmetic and Geometric Sequences
Arithmetic Series
Geometric Series


Looking for a deeper understanding of sequences & series?
Watch these Khan Academy Videos

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