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# Linera sequence

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### Transcript

• 1. 01/28/15 D. Smith 1 Linear sequences A linear sequence is a name for a list of numbers where the next number is found by adding or subtracting a constant number. Here is an example:
• 2. 01/28/15 D. Smith 2 5, 8, +3
• 3. 01/28/15 D. Smith 3 5, 8, 11, +3 +3
• 4. 01/28/15 D. Smith 4 5, 8, 11, 14 +3 +3 +3
• 5. 01/28/15 D. Smith 5 5, 8, 11, 14, 17&#x2026; +3 +3 +3 +3 etc
• 6. 01/28/15 D. Smith 6 Finding the a rule for the nth term Position (n) 1 2 3 4 5 Value 5 8 11 14 17 This is a rule that connects a term&#x2019;s position (n) with its value.
• 7. 01/28/15 D. Smith 7 Find the nth rule for this sequence: 5, 8, 11, 14, 17&#x2026; &#xF06E; Make a table with 5 columns and write the position of the terms &#x2013; 1st 2nd 3rd 4th etc as the n numbers in the first column n 1 2 3 4 5
• 8. 01/28/15 D. Smith 8 Put the terms into the second column, 5, 8, 11, 14, 17&#x2026; n Term 1 5 2 8 3 11 4 14 5 17 6
• 9. 01/28/15 D. Smith 9 Find the difference between the terms 8 &#x2013; 5 = 3 and write it in the third column n Term Difference 1 5 3 2 8 3 3 11 3 4 14 3 5 17 3 6
• 10. 01/28/15 D. Smith 10 Write the difference number multiplied by the n number in the fourth column n Term Difference 3n 1 5 3 3 2 8 3 6 3 11 3 9 4 14 3 12 5 17 3 15 6
• 11. 01/28/15 D. Smith 11 Write the difference between the value of 3n and the term in the fifth column n Term Difference 3n Term &#x2013; 3n 1 5 3 3 2 2 8 3 6 2 3 11 3 9 2 4 14 3 12 2 5 17 3 15 2 6
• 12. 01/28/15 D. Smith 12 The nth rule is: Term = 3n + 2
• 13. 01/28/15 D. Smith 13 n Term = 3n + 2 Term 1 3 X 1 + 2 5 2 3 X 2 + 2 8 3 3 X 3 + 2 11 4 3 X 4 + 2 14 5 3 X 5 + 2 17