if the average of the consecutive even integers a,b, and c is less than 13a, which of the following best describes the value of a?
答案: a is positive
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sysadmin
提问:
【请May老师回答】这题鸡精提供的答案是D 可是我觉得第二个条件不能得出呢 假设n三次方是x平方 除以n平方 是可以得到x/ n 平方 但是x/n 不一定是整数呀?