#### Answer

$n=22$

#### Work Step by Step

$a_n=2+\sqrt{n+3}$ when $a_n=7$
$2+\sqrt{n+3}=7$
$\implies \sqrt{n+3}=5$
$\implies n+3=25$
$\implies n=22$

Published by
Brooks Cole

ISBN 10:
0-53449-636-9

ISBN 13:
978-0-53449-636-4

$n=22$

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