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## anonymous 4 years ago find the 10th term of the geometric sequence. -0.125, 0.25, -0.5, 1, -2

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1. anonymous

looks like $a_n=\frac{1}{8}\times (-1)^k(2)^{k-1}$

2. anonymous

probably could be more elegantly written

3. anonymous

then replace k by 10 to get your answer

4. anonymous

64

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