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geometric series/geometric progression

 
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Jan5-07, 05:36 PM   #1
 

geometric series/geometric progression

I can't figure this out for the life of me:

A geometric series exists with the third term of 8 and the sixth term of 128, what is the geometric series?
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Jan5-07, 05:38 PM   #2
 
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Have you tried anything at all? What do you know about geometric series?
Jan6-07, 05:44 PM   #3
 
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In particular, do you know the formula for the nth term of a geometric sequence? Use that formula knowing that a3= 8 and a6= 128 to get two equations in the two parameters you need.
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