# Arithmetic Series Examples

### Example 1

Find the 7th partial sum of the sequence { n – 1). |

### Example 2

Find the 14th partial sum of the sequence { n + 20. |

### Example 3

Find the sum of -6, 0, 6,…, 66, 72. |

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Find the 7th partial sum of the sequence { n – 1). |

Find the 14th partial sum of the sequence { n + 20. |

Find the sum of -6, 0, 6,…, 66, 72. |