Geometric series/geometric progression

  • Thread starter Elec68
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  • #1
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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?
 

Answers and Replies

  • #2
Hurkyl
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Have you tried anything at all? What do you know about geometric series?
 
  • #3
HallsofIvy
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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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