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Consider the following geometric sequence:

8,-56,392,-2744,19208...

Identify the first term and the common ratio.

First term =
Common ratio =

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   x  x    n  |   | (   ) π DNE
   x    (   ) π DNE
( ) ( ] [ ) [ ] —∞ DNE
< > or All Real Numbers DNE
log logn ln n  | | e 
sin cos tan arcsin arccos arctan  
[more..]