What is the value of 1+3+5+⋯+2017+2019−2−4−6−⋯−2016−2018?
Pick one
Solution
Rearranging the terms, we get (1−2)+(3−4)+(5−6)+...(2017−2018)+2019, and our answer is −1009+2019=(E) 1010. If you were stuck on this problem, refer to AOPS arithmetic lessons. ~Nivaar
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