ＧＷＤ数学一小题

legnawen

Q26:

K is a set of integers such that if the integer r is in K, then r + 1 is also in K.Is 100 in K?

(1)50 is in K.

(2)150 is in K.



A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

答案选Ａ我选Ｅ。看看是否答案错了呀？

MarilynR

是A 哎。。你想啊。。50 In k就知道51 IN K 。。。。以此类推就OK拉

legnawen

哎呀我想多了，我老觉得是个数列需要限定范围。多谢提点！