Answer
$S_{50}=15100$
Work Step by Step
$d=20-8=32-20=12$
$a_n=a_1+(n-1)d$
$a_{50}=8+(50-1)12$
$a_{50}=8+49(12)$
$a_{50}=596$
$S_n=\frac{n}{2}(a_1+a_n)$
$S_{50}=\frac{50}{2}(8+596)=25(604)=15100$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 11 - 11.2 - Arithmetic Sequences and Partial Sums - 11.2 Exercises - Page 786: 51
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