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OpenStudy (anonymous):
What is the 8th term of the geometric sequence where a1 = 625 and a3 = 25?
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Parth (parthkohli):
Looks like 5^4, then 5^3, then 5^2.. and so on
Parth (parthkohli):
5^4 - 1st 5^3 - 2nd 5^2 - 3rd 5^1 - 4th 5^0 - 5th 5^-1 - 6th 5^-2 - 7th 5^-3 - 8th
Parth (parthkohli):
\( \color{Black}{\Rightarrow 5^{-3} = {1 \over 5^3} = {1 \over 125}}\)
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