Answer :
.Solution
Given the series -33,-27,-21,-15....
[tex]\begin{gathered} -27-(-33)=-27+33=6 \\ -21-(-27)=-21+27=6 \end{gathered}[/tex]Since the sequence has a common difference (6), it is an Arithmetic series
The common difference is +6
The sum to infinity of the sequence will diverge since we are adding infinite numbers