Answer
8 terms.
Work Step by Step
The expansion contains 8 terms. Because the binomial coefficient before each term goes from $\binom{7}{0}$ to $\binom{7}{7}$, it contains 8 terms.
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 14 - Sequences, Series, and the Binomial Theorem - 14.4 The Binomial Theorem - 14.4 Exercise Set - Page 921: 8
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