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8.2. DAY 55 Arithmetic sequences and partial sums.notebook 1 April 17, 2015 1. DAY 55 April 16/17, 2015 How many different ways can 6 different books be arranged on a shelf? Alexa has 3 different math books and 4 different geography books. Determine th number of ways all 7 books can be arranged on the shelf if there are no restrictions the math books are on the left and the geography books are on the right the books in the same subject must be kept together 2.

8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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Page 1: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

1

April 17, 2015

1.DAY 55 April 16/17, 2015

How many different ways can 6 different books be arranged on a shelf?

Alexa has 3 different math books and 4 different geography books. Determine the number of ways all 7 books can be arranged on the shelf if

there are no restrictionsthe math books are on the left and the geography books are on the rightthe books in the same subject must be kept together

2.

Page 2: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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April 17, 2015

Learning Goal 5.2. Reassessment

OTL Questions?

Page 3: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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April 17, 2015

8.2. ARITHMETIC SEQUENCES, PARTIAL SUMS, SERIES, and SUMMATION NOTATION.

a) 1, 3, 5, 7, ...b) 2, 5, 10, 17, …

c) 17, 21, 25, …

Example: Which of these are arithmetic? 

Page 4: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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April 17, 2015

 c=a0

EXPLICIT FORMULA FOR THIS SEQUENCE IS

6, 11, 16, 21, ..., 41, ...,                   , ...a1    a2     a3      a4            a8

6, 11, 16, 21, ..., 41, ...,                   , ...a1    a2     a3      a4            a8

Alternate explicit formula:

Arithmetic sequences and the recursive formula

The nth term of an arithmetic sequence has the recursive formula:

But since we know that each term in an arithmetic sequence is evenly spaced, we can also find the nth term of an arithmetic sequence using the alternate explicit formula:

Page 5: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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April 17, 2015

Examples: Find the nth term of the arithmetic sequence.                    Write the explicit and the recursive formula.

b)

Page 6: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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Page 7: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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Page 8: 8.2. DAY 55 Arithmetic sequences and partial sums.notebooklindblomeagles.org/ourpages/auto/2015/4/20/58004411... · 4/20/2015  · 8.2. DAY 55 Arithmetic sequences and partial sums.notebook

8.2. DAY 55 Arithmetic sequences and partial sums.notebook

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April 17, 2015