AMC 8 2005 Problem 8
AMC8 2005 年第 8 题
奇偶性★★☆☆☆
Suppose m and n are positive odd integers. Which of the following must also be an odd integer?
假设 m 和 n 都是正奇数，下面哪个一定也是奇数？
- A.m+3n
- B.3m-n
- C.3m^2 + 3n^2
- D.(nm + 3)^2
- E.3mn
正确答案 · Correct Answer
E
解析 · Solution
解析整理中
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