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Discrete Math Unit 5 Quiz

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1. Write the first four terms of the sequence whose general term is an = 2( 4n - 1) (Points : 3) | 6, 14, 22, 30 -2, 6, 14, 22 3, 7, 11, 15 6, 12, 18, 24 |

2. Write the first four terms of the sequence an = 3 an-1+1 for n ≥2, where a1=5 (Points : 3) | 5, 15, 45, 135 5, 16, 49, 148 5, 16, 46, 136 5, 14, 41, 122 |

3. Write a formula for the general term (the nth term) of the arithmetic sequence 13, 6, -1, -8, . . .. Then find the 20th term. (Points : 3) | an = -7n+20; a20 = -120 an = -6n+20; a20 = -100 an = -7n+20; a20 = -140 an = -6n+20; a20 = -100 |

4. Construct a series using the following notation:
(Points : 3) | 6 + 10 + 14 + 18 -3 + 0 + 3 + 6 1 + 5 + 9 + 13 9 + 13 + 17 + 21 |

5. Evaluate the sum:
(Points : 3) | 7 16 23 40 |

6. Find the 16th term of the arithmetic sequence 4, 8, 12, .... (Points : 3) | -48 56 60 64 |

7. Identify the expression for the following summation:(Points : 3) | 6 3 k 4k - 3 |

8. A man earned $2500 the first year he worked. If he received a raise of $600 at the end of each year, what was his salary during the 10th year? (Points : 3) | $7900 $7300 $8500 $6700 |

9. Find the common ratio for the geometric sequence.: 8, 4, 2, 1, 1/2 (Points : 3) | -2 1/2 2 -1/2 |

10. What name do we give a sequence with an unlimited number of terms? (Points : 3) | Finite series Infinite series Infinite sequence Finite sequence |

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