2. 外语
  3. n是奇数吗? (1)n4-2是偶数 (2)是整数

n是奇数吗? (1)n4-2是偶数 (2)是整数

admin2022-11-09  49
问题 n是奇数吗?
(1)n4-2是偶数
(2)是整数
选项 A、Statement (1) ALONE is sufficient, but statement (10) alone is not sufficient to answer the question asked.
B、Statement (2) ALONE is sufficient, but statement (9) alone is not sufficient to answer the question asked.
C、BOTH statement (1) and (10) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient to answer the question asked.
E、Statement (1) and(10)TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.
答案D
解析 单独(1)：n4-2是偶数，偶数-偶数=偶数，所以n4为偶数。n可以为无理数，比如-2=2；单独(2)是整数，那么n一定是整数，但是奇是偶，不得而知。把(1)+(2)结合起来，得到n是整数，但一定不是奇数。
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