Question 742223
GEOMETRIC sequence, so general term is a*r^(n-1), where n is the index of the term. a is the value of the term at n=1.


You know that -2 is the term at n=1, and {{{-512=(-2)*r^(5-1)}}}.  That's it, just solve for r.  You will then have the formula for the general term of your sequence.  You can then compute any term you wish.