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# Pc 9.2 notes

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### Pc 9.2 notes

1. 1. March 23, 20129.2 ArithmeticSequences and PartialSumsEssential Question:How do you find the nth term or partial sum of anarithmetic sequence? 1
2. 2. March 23, 2012Whats an "arithmetic" sequence? 2
3. 3. March 23, 2012Two forms of arithmeticsequences: 3
4. 4. March 23, 2012Ex. 1) Find a formula for the nth term of the arithmeticsequence whose common difference is 5 and whose firstterm is -1. 4
5. 5. March 23, 2012Ex. 2) The 8th term of an arithmetic sequence is 25and the 12th term is 41. Write the first 5 terms ofthis sequence. 5
6. 6. March 23, 2012Ex. 3) Find the 10th term of the arithmetic sequence thatbegins with 8 and 20. 6
7. 7. March 23, 2012Sum of a Finite ArithmeticSequence- 7
8. 8. March 23, 2012Ex. 4) Find the sum: 40 + 37 + 34 + 31 + 28 + 25 + 22 8
9. 9. March 23, 2012Ex. 5) Find the sum of the given integers:a) 1 to 35b) 1 to 57 9
10. 10. March 23, 2012Ex. 6) Find the 50th partial sum of the arithmeticsequence -6, -2, 2, 6, . . . 10
11. 11. March 23, 2012Assignment:9.2 p. 659 #11, 14, 16, 20, 21,27, 29, 35, 36, 45, 57, 61, 63,67, 71 11