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我们很容易明白连续自然数的平均数有下面两个性质: 性质1奇数个连续自然数的平均数就是这奇数个连续自然数正中间的那个数。
It is easy to see that the average of consecutive natural numbers has the following two properties: Property 1 The average of odd consecutive natural numbers is the mid-point of the odd consecutive natural numbers.