SOLUTION: Write the explicit formula that represents the geometric sequence -2, 8, -32, 128

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Question 1021708: Write the explicit formula that represents the geometric sequence -2, 8, -32, 128
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
g%5B1%5D+=+-2 and r = -4.
==> g%5Bn%5D+=+-2%2A%28-4%29%5E%28n-1%29+=+%28-4%29%5En%2F2