#### Answer

$a_1=2$
$a_2=4$
$a_3=12$
$a_4=48$

#### Work Step by Step

$a_1=2$
$a_2=2\times a_1=2\times 2=4$
$a_3=3\times a_2=3\times 4=12$
$a_4=4\times a_3=4\times 12=48$

Published by
Pearson

ISBN 10:
013421742X

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

$a_1=2$
$a_2=4$
$a_3=12$
$a_4=48$

$a_1=2$
$a_2=2\times a_1=2\times 2=4$
$a_3=3\times a_2=3\times 4=12$
$a_4=4\times a_3=4\times 12=48$

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