College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 8 - Sequences, Induction, and Probability - Concept and Vocabulary Check - Page 750: 2


See below.

Work Step by Step

By substituting in: for $n=3$: $2+4+6=3(3+1)$ for $n=k+1$: $2+4+6+...+2(k+1)=(k+1)(k+2)$
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