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# Chapter 6 Vocabulary

### Chapter 6 math vocab

Term | Definition |
---|---|

nth root | when bn = a for an integer n greater than 1, b is the nth root of a |

exponential function | a function of the form y = ab x , where a doesn’t equal 0, b doesn’t equal 1, and b > 0. |

exponential growth | when a quantity increases by the same factor over equal intervals of time. |

exponential growth function | a function of the form y = a(1 + r)t , where a > 0 and r > 0. |

exponential decay | when a quantity decreases by the same factor over equal intervals of time. |

exponential decay function | a function of the form y = a(1 - r)t , where a > 0 and 0 < r < 1. |

compound interest | interest earned on the principal and on previously earned interest. |

geometric sequence | a sequence in which the ratio between consecutive terms is the same; this ratio is called the common ratio. |

common ratio | the ratio between consecutive terms of a geometric sequence. |

recursive rule | gives the beginning term(s) of a sequence and an equation that indicates how any term an in the sequence relates to the previous term. |

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