Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 2 - Reasoning and Proof - 2-3 Biconditionals and Definitions - Practice and Problem-Solving Exercises - Page 104: 57


4, -2

Work Step by Step

Inspecting the sequence, you can see that you alternate between adding and subtracting to derive the next term. The addend/subtrahend increases by 1 as each subsequent term is computed. To find the next term, add 5. To find the term after that, subtract 6.
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