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Given two terms in a geometric sequence find the term named: a5= -324 and a2=12 Find a 9

 Oct 2, 2020
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-(324 / 12)^1/3 = - 3 This is the common ratio.

 

12 / -3 = -4 This is the first term.

 

The sequence looks like this from 1st term to 9th term

 

-4,  12,  -36,  108,  -324,  972,  -2916,  8748,  -26244  

 

9th term =-26244

 Oct 2, 2020

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