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Coolmath Algebra
Sequences & Series Lesson 5 - Arithmetic Sequences (page 1 of 6) 
---- This algebra lesson explains arithmetic sequences.

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These are arithmetic sequences:

1 , 2 , 3 , 4 , 5 , 6 , ...
 

0 , 3 , 6 , 9 , 12 , ...
 

10 , 5 , 0 , -5 , -10 , ...
 

Do you see the pattern for how each of these changes?

1 , 2 , 3 , 4 , 5 , 6 , ... add 1 to get the next guy in the sequence

We add 1 each time.

0 , 3 , 6 , 9 , 12 , ... add 3 to get the next guy in the sequence

We add 3 each time.

10 , 5 , 0 , -5 , -10 , ... subtract 5 to get the next guy in the sequence

We add -5 each time.

So, arithmetic sequences change by adding a number to each term.

We called this number the "difference."

Continued on the next page

 The printing and distribution and/or downloading of these lessons is strictly prohibited.
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