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[Problem Solving]
试题详情
题目：
A set of numbers has the property that for any number t in the set, t + 2 is in the set. If -1 is in the set, which of the following must also be in the set?
I.-3
II.1
III.5
I.-3
II.1
III.5
选项:
A、I only
B、II only
C、I and II only
D、II and III only
E、I, II, and III
答案:
D
提问：
但为什么不能假设X+2=t(-1),得出X=-3？
解答：
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提问：
但为什么不能假设X+2=t(-1),得出X=-3？
解答：
点赞0
阅读962
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