ChaseDream

标题: cxd-233页145 [打印本页]

作者: pheobe 时间: 2008-7-26 08:58
标题: cxd-233页145

{x} denotes the greatest integer less than or equal to x. Is {x}=1?

(1) x>1

(2)x<2

答案是C, 可能我理解错了吧,如果x是代表一个范围的话, (1) 可以肯定=1,(2) 可以肯定不等于1

应该怎么理解啊

作者: jh1904 时间: 2008-7-26 09:39
x>1, x can be 2,3,4,5....... so {x} can not be decided.

x<2, x can be 1,0,-1,-2..... so {x} can not be decided.

1<x<2, x can be 1.1, 1.11, 1.2........... so {x} can only be 1.

欢迎光临 ChaseDream (https://forum.chasedream.com/)