Answer
$7$
Work Step by Step
For $n=14$; we have $a_{14}=1+13(-3-1)=-51$
and
For $n=12$; we have $b_{12}=3+11(8-3)=58$
Thus, $a_{14}+b_{12}=-51+58$
or, $a_{14}+b_{12}=7$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 11 - Section 11.2 - Arithmetic Sequences - Exercise Set - Page 840: 51
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