## Mathematical Analysis## Sequences and Series |

## What is the notation commonly used for series and sequences? |

When looking at a sequence and series, we need to distinguish between the ones we want to add, and the ones we do not want to add. The common symbol used for addition with a sequence or a series is the summation symbol, seen as the symbol Σ. When discussing a series, this symbol is used to mean the sum of numbers. For example, for the series called *x _{n}:*

Also note that for any given series Σ*x*_{n}, we have to also remember to associate it with the sequence of partial sums (*s*_{n} = *x*_{1} + *x*_{2} + … + *x*_{n}).