Transcript
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CHAPTER 1111.2: Arithmetic Sequences
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DEFINITIONS
An arithmetic sequence is when we add the same number to each term to get the next term. The number added is the common difference.
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IS THE SEQUENCE ARITHMETIC?
2, 4, 8, 16, …
6, 12, 18, …
48, 45, 42, …
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ARITHMETIC FORMULAS
Recursive: an = an – 1 + d
Explicit: an = a1 + (n – 1)d
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FINDING THE TERM
Find the 76th term of 1100, 1135, 1170, …
Find the 90th term of 5, 11, 17, …
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ARITHMETIC MEAN
The arithmetic mean is the average of 2 numbers.
Find the missing term of the arithmetic sequence. 84, _______, 100
24, _______, 57
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ASSIGNMENT
p. 596 2-30 evens