# Sigma notation

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##### Examples

###### Lessons

- Evaluate the following arithmetic series:

- Write the following sum in sigma notation, then evaluate

$7+9+11+13+...+205$

- Evaluate the following geometric series:

- Write the following sum in sigma notation, then evaluate

$-100+10-1+\frac{1}{10}-\frac{1}{100}$ - Use sigma notation to express $S_{10}$ for $-5, 10, -20, 40, ...$, then evaluate

- Evaluate the following infinite geometric series:

- Write the following sum in sigma notation, then evaluate