what is the average of eleven consecutive integers?
(1)the average of the first nine integers is 7
(2)the average of the last nine integers is 9
我想问下这个说的consecutive integer一定是有排列顺序的么?是从小到大还是从大到小?
都可以,这个题干无关紧要
考点在选项
一旦数列定下来,答案就定下来了
D
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