Question

Find term number 31 in the arithemetric sequence Given: an = 2n + 8

Answer 1

Substitute 31 for n in an = 2n + 8 to obtain the 31 number term.

$\begin{gathered} a_{31}=2\cdot31+8 \\ =62+8 \\ =70 \end{gathered}$

So term number 31 is 70.