#### Answer

$a_{5}=5000;$
$a_{n}=8\times \left( -5\right) ^{n-1}$

#### Work Step by Step

$a_{5}=a_{1}\times r^{4}=8\times \left( -5\right) ^{4}=5000;$
$a_{n}=a_{1}\times \left( r\right) ^{n-1}=8\times \left( -5\right) ^{n-1}$

Published by
Pearson

ISBN 10:
013421742X

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

$a_{5}=5000;$
$a_{n}=8\times \left( -5\right) ^{n-1}$

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