K is a set of integers such that if the integer r is in the K,then r+1 is also
in K.Is 100 in K?
1.50 is in K
2.150 is in K
答案是 A,但我认为选D,(2)也对,{1,2,....100,...150...}是否也可以?
选A没有错的!
条件二只能推出150+1,150+2,150+3.....在数列里头,题目的已知并密有告诉我们可以倒推,所不充分!
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/) | Powered by Discuz! 7.2 |