Raymond B. answered • 04/14/21
Tutor
5
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Math, microeconomics or criminal justice
the 3rd one has a common ratio r=-x^2
each term is r times the preceding term
the 1st two are combinations of a geometric and arithmetic sequence, common ratio of x, for the variable, combined with coefficients that have a common difference of 3, except for the 1st term. the 2nd sequence is just a multiple of the 1st sequence. But neither is strictly a geometric sequence.
