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Unformatted text preview: 9.1 Finding the nth term and Summation Notation
Monday, October 31, 2011
6:51 AM Notebook Quiz/Check on next block day.
End of Grading Period: Nov. 4 Agenda:
1. Turn in HW#32
2. Whiteboard Work
3. Lesson: 9.1 Finding the nth term and Summation Notation
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Whiteboard Work
Simplify the ratio of factorials _______________________
Lesson: 9.1 Finding the nth term and Summation Notation
Goal: Find the nth term of a sequence and use summation notation
Find the nth term
Write an expression for the apparent nth term ( ) of each sequence.
common differences
common ratios squares patterns with fractions alternating signs Ch_9 Page 1 Summation Notation
DOD
Definition of Summation Notation index of summation (commonly , but can be any variable)
upper limit of summation (index of where you end)
lower limit of summation (index where you begin, commonly 1)
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Examples
Find the sum
Find all of the terms and add them up! Write in Summation Notation
Ask yourself…
• what is changing? How?
• What is the lower limit? (first index)
• What is the upper limit? (last index) Ch_9 Page 2 Ch_9 Page 3 ...
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 Spring '11
 byrns
 Math

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