1. March 23, 2012
9.2 Arithmetic
Sequences and Partial
Sums
Essential Question:
How do you find the nth term or partial sum of an
arithmetic sequence?
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2. March 23, 2012
What's an "arithmetic" sequence?
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3. March 23, 2012
Two forms of arithmetic
sequences:
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4. March 23, 2012
Ex. 1) Find a formula for the nth term of the arithmetic
sequence whose common difference is 5 and whose first
term is -1.
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5. March 23, 2012
Ex. 2) The 8th term of an arithmetic sequence is 25
and the 12th term is 41. Write the first 5 terms of
this sequence.
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6. March 23, 2012
Ex. 3) Find the 10th term of the arithmetic sequence that
begins with 8 and 20.
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7. March 23, 2012
Sum of a Finite Arithmetic
Sequence-
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8. March 23, 2012
Ex. 4) Find the sum:
40 + 37 + 34 + 31 + 28 + 25 + 22
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9. March 23, 2012
Ex. 5) Find the sum of the given integers:
a) 1 to 35
b) 1 to 57
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10. March 23, 2012
Ex. 6) Find the 50th partial sum of the arithmetic
sequence -6, -2, 2, 6, . . .
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11. March 23, 2012
Assignment:
9.2 p. 659 #11, 14, 16, 20, 21,
27, 29, 35, 36, 45, 57, 61, 63,
67, 71
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