Pearson Algebra 2 Common Core, 2011
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Pearson Algebra 2 Common Core, 2011 View details
Mid-Chapter Quiz
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Exercise 18 Page 579

What makes a sequence arithmetic?

Arithmetic Sequence? Yes.
Common Difference: -2

Practice makes perfect
When a sequence is arithmetic, the difference between two consecutive terms is constant.

1 +(-2) → -1 +(-2) → -3 +(-2) → -5 +(-2) → -7 Therefore, the sequence is arithmetic and the common difference is -2.