Algebra
posted by Bob .
The first term in the sequence is 2 and the fifth term is 1/8 what is the common ratio

since you used the term 'common ratio' I must assume your sequence is geometric
term(5) = ar^4
ar^4 = 2(r^4) = 1/8
r^4 = 1/16
take 4th root
r = ± 1/2
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