mattinocoee mattinocoee

22-05-2017
Mathematics

contestada

Write the sum using summation notation, assuming the suggested pattern continues.

9 - 18 + 36 - 72 + ...

(Please not that it is asking for SUMMATION NOTATION, so the answer is NOT 45)

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HallieBaker HallieBaker

22-05-2017

The pattern is switching from adding double the number, to subtracting double the number. So the answer would be 144 I think.

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