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How many even integers are between 17/4 and 47/2?A、9B、8C、6D、5E、4A[img]2022m
How many even integers are between 17/4 and 47/2?A、9B、8C、6D、5E、4A[img]2022m
游客
2025-02-23
24
管理
问题
How many even integers are between 17/4 and 47/2?
选项
A、9
B、8
C、6
D、5
E、4
答案
A
解析
所以所求偶数必然是大于4小于23,也就是从6到22的连续偶数,一共有多少个呢?当然这么小的数字,可以枚举出来。但是如果数字大的话,就可以用等差数列的公式了。22=6+(n-1)×2,因此n=9,选择A。
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