How do you find the indicated term of the arithmetic sequence $a_1=2$ d=1/2, n=8?

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Answer 1 · 2016-12-24T16:44:02

$a_8=5 1/2$

In a arithmetic sequence, whose first term is $a_1$ , common difference is $d$ and $a_n$ is the $n^(th)$ term

$a_n=a_1+(n-1)xxd$

As in given case $a_1=2$ , $d=1/2$ and $n=8$

$a_8=2+(8-1)xx1/2=2+7xx1/2=2+7/2=2+3 1/2=5 1/2$

How do you find the indicated term of the arithmetic sequence a_1=2a_1=2 d=1/2, n=8?