Answer
$a_n=8+(n-1)(-3)$
Work Step by Step
The nth term of an arithmetic sequence can be obtained by the following formula: $a_n=a_1+(n-1)d$, where $a_1$ is the first term and $d$ is the common difference.
Hence here: $d=5-8=-3,a_1=8,a_n=8+(n-1)(-3)$
