2. 外语
  3. 11×13×17×19×23 A decrease of 1 in which of the factors above would result in the greatest decrease in the product?

11×13×17×19×23 A decrease of 1 in which of the factors above would result in the greatest decrease in the product?

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问题 11×13×17×19×23
A decrease of 1 in which of the factors above would result in the greatest decrease in the product?
选项 A、11
B、13
C、17
D、19
E、23
答案A
解析 上式中哪一个因子(factor)的值减小1将导致该式的乘积减少最大?
解：本题的正确答案为(A)。设n为上式中的任一个因子，则当n减少1时，其乘积将减少1/n，所以n越小时减少的越多。
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