#### Answer

215

#### Work Step by Step

$S_{n}=\dfrac {2a_{1}+\left( n-1\right) d}{2}\times n;d=14-11=11-8=3\Rightarrow S_{10}=\dfrac {2\times 8+\left( 10-1\right) \times 3}{2}\times 10=43\times 5=215$

Published by
Pearson

ISBN 10:
013421742X

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

215

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