LamoubpanHanLu LamoubpanHanLu

08-11-2016
Mathematics

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What is the 7th term of the geometric sequence where a1 = -4,096 and a4 = 64?

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scme1702 scme1702

12-11-2016

First, we calculate the common ratio.
an = arⁿ⁻¹
64 = -4096r³
r = -1/4
a(7) = -4096r⁷⁻¹
a(7) = -1

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