# Algebra

posted by Bob

The first term in the sequence is -2 and the fifth term is -1/8 what is the common ratio

1. Reiny

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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