Answer
$48$
Work Step by Step
If $\int ^{4}_{2}xdx=6$ (given in question)$ \Rightarrow $
$$\int ^{4}_{2}8xdx=8\int ^{4}_{2}xdx=8\times 6=48$$
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 4 - Integration - Page 274: 35
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