A set of numbers has property that for any number T in the set, T+2 in in the set. If -1 is in the set, which of the following also be in the set?
(1) -3 (2)1 (3)5
答案是(2)&(3)
我怎么觉得是(1)&(2) 啊?
T ,T+2, T+4..這樣的一個set.等差2
所以ANS 為1跟 5
以下是引用himba在2004-12-9 7:10:00的发言: 偶的理解是,,T ,T+2, T+4..這樣的一個set.等差2
所以ANS 為1跟 5
明白了,谢谢
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