#### Answer

$\dfrac {728}{9}=80\dfrac {8}{9}$

#### Work Step by Step

$\sum ^{3}_{i=-2}2\left( 3\right) ^{i}=2\times 3^{-2}+2\times 3^{-1}+2\times 3^{0}+2\times 3^{1}+2\times 3^{2}+2\times 3^{3}=\dfrac {728}{9}=80\dfrac {8}{9}$

Published by
Pearson

ISBN 10:
013421742X

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

$\dfrac {728}{9}=80\dfrac {8}{9}$

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