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Find the sum 200 - 199 + 198 - 197 + .196 - ... + 2 - 1.

 Dec 6, 2019

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sum_(n=1)^200 (-1)^(n + 1) (201 - n) = 100

 Dec 6, 2019
 #1
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sum_(n=1)^200 (-1)^(n + 1) (201 - n) = 100

Guest Dec 6, 2019

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