[tex]-6,6,-6,6,-6,6[/tex]
This is an alternating sequence, from the pattern, we can conclude the 7th term is:
[tex]a_7=-6[/tex]
The 8th term is:
[tex]a_8=6[/tex]
And the formula would be given by:
[tex]\begin{gathered} a_n=6(-1)^n \\ n\in\N \\ n\ge1 \end{gathered}[/tex]
