Answer
$-30$
Work Step by Step
$a_2=10-4(2)=2$
$a_3=10-4(3)=-2$
$a_4=10-4(4)=-6$
$a_5=10-4(5)=-10$
$a_6=10-4(6)=-14$
Hence $\sum_{i=2}^6(10-4i)=2-2-6-10-14=-30$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 12 Sequences and Series - Chapter Review - Page 840: 6
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