1. Sequences & Series

2. Sequences  A sequence is a function whose domain is the set of all positive integers.  The first term of a sequences is denoted a 1  The second term of a sequences is denoted a 2  The nth term of a sequence is denoted a n

3. Arithmetic Sequences  A sequence that is obtained by adding a constant d to the previous term.  Give the next 3 terms.  What’s being added repeatedly (d)?

4. Generating Sequences  Give the first 4 terms of the arithmetic sequence whose first term is 12 with a common difference 7.  Give the first 4 terms of the arithmetic sequence whose first term is 241 with a common difference –31. 12, 19, 26, 33 241, 210, 179, 148

5. Generating Sequences  Give the first 4 terms of the sequence. 5, 8, 11, 14 5, 11, 17, 23

6. Arithmetic Means  The missing terms of an arithmetic sequence are called arithmetic means.  Find the missing terms of the following arithmetic sequence.  11,,, 38, …  16,,,, -24, … 2029 6-14-4

7. Definitions/Rules  Write a rule for the following arithmetic sequence. 5, 7, 9, 11, 13, … What’s the first term? What’s the common difference? Plug into formula.

8. Geometric Sequences  A sequence that is obtained by multiplying the common ratio r to the previous term.  Give the next 3 terms.  What’s being multiplied repeatedly?

9. Generating Sequences  Give the first 4 terms of the geometric sequence whose first term is 3 and with a common ratio 4.  Give the first 4 terms of the geometric sequence whose first term is -2 and with a common ratio -3. 3, 12, 48, 192 -2, 6, -18, 54

10. Generating Sequences  Give the first 4 terms of the geometric sequence. 5, 10, 20, 40

11. Geometric Means  The missing terms of a geometric sequence are called geometric means.  Find the missing terms of the following geometric sequence.  6,,, 162,…  -1,,,, -625, … 1854 -5 or +5-25 -125 or +125

12. Definitions/Rules  Write a rule for the following geometric sequence. 1, 4, 16, 64, … What’s the first term? What’s the common ratio? Plug into formula.

13. Series  A series is the sum of terms of a sequence.  Summation (Sigma) Notation is used. Starting value to plug in Ending value to plug in The function used 56

14. Evaluate the Series