Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 11 - Section 11.4 - Partial Sums of Arithmetic and Geometric Sequences - Exercise Set - Page 658: 1

Answer

$S_6=36$

Work Step by Step

Using $S_n=\dfrac{n}{2}(2a_1+(n-1)d)$, the sum of the first $ 6$ terms of the sequence $ 1,3,5,7,... $ is \begin{array}{l} S_6=\dfrac{6}{2}(2\cdot1+(6-1)2)\\\\ S_6=3(2+10)\\\\ S_6=36 .\end{array}
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