Given:
The first term
[tex]a_1=-23[/tex]
The common difference, d=6
To find
[tex]a_{79}[/tex]
Using the nth term formula,
[tex]\begin{gathered} a_n=a+(n-1)d \\ a_{79}=-23+(79-1)6 \\ =-23+(78)6 \\ =-23+468 \\ =445 \end{gathered}[/tex]
Hence, the answer is,
[tex]a_n=445[/tex]
