SOLUTION: Find the sixth term in the sequence in which a^4=20 and r=-3

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Question 935574: Find the sixth term in the sequence in which a^4=20 and r=-3

Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Is "a" the first term, at index 1 ?
a=20%5E%281%2F4%29
a=%282%5E2%2A5%29%5E%281%2F4%29
a=2%5E%281%2F2%29%2A5%5E%281%2F4%29
more easily stated as 20%5E%281%2F4%29


The sixth term would be a*r^(5)
%2820%5E%281%2F4%29%29%28-3%29%5E5
highlight%28-243%2A20%5E%281%2F4%29%29

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

Find the sixth term in the sequence in which a^4=20 and r=-3
With r being - 3, this seems to be a GP (geometric progression)

If you meant: a%5B4%5D+=+20, then 6th term, or highlight_green%28a%5B6%5D+=+180%29

You can do the check!! 

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