Precalculus (6th Edition)

by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie

Published by Pearson

ISBN 10: 013421742X

ISBN 13: 978-0-13421-742-0

Chapter 11 - Further Topics in Algebra - Test - Page 1085: 8

Answer

$2385$

Work Step by Step

We can identify the sequence as arithmetic with $a_1=7, d=5$, thus the sum is $S_{30}=\frac{30}{2}(a_1+a_{30})=15(7+7+(30-1)(5)))=2385$

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