SOLUTION: 8th term of geometric sequence with the first term of -2 and the fifth term -512

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Question 742223: 8th term of geometric sequence with the first term of -2 and the fifth term -512
Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
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=%28-2%29%2Ar%5E%285-1%29. 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.