Question

HELP ME! Question on arithmetic sequencing. Attachment below! Help much appreciated! My question is what equation would I use to solve this and how would I plug all the variables in?

Answer 1

@whpalmer4 @hartnn

Answer 2

@ganeshie8

Answer 3

Didn't we go over this?

\[a_n = a_1 + (n-1)d\]

You have \(a_1 = -7\) and \(d = 3\). Plug those numbers into the formula to get the formula tailored to this problem. Then, to find \(a_n\) you take the \(n\) from the subscript and plug that in as the value of \(n\) and evaluate. For example, to find \(a_3\), you would put in \(n = 3\)