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【OG20-P164-120题】
The sum of all the integers k such that −26 < k < 24 is
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题目：已知−26 < k < 24，那么k可取的所有整数和为多少？
解：由题可知，k可取的整数有-25，-24...23，其中从-23到23的所有整数和为0，因此所有k值得和为（-25）+（-24）=-49
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2016-10-18 15:18:57
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