How do you find the indicated term of each arithmetic sequence $a_1=12$ d=-7, n=22?

Question

12852 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-17T07:21:55

$22^(nd)$ term $color(indigo)(a_22 = 159$

$nth$ term of an Arithmetic Sequence is given by the formula,

$a_n = a_1 + (n-1)*d$

Given $a_1 = 12, d = 7, n = 22$

$:. a_22 = 12 + (22-1)*7$

$a_22 = 12 + (21 * 7) = 12 + 147 = 159$

How do you find the indicated term of each arithmetic sequence a_1=12a_1=12 d=-7, n=22?