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标题: 一道GMAT数学题求解释啊！ [打印本页]

作者: neverland8965 时间: 2013-4-30 18:05
标题: 一道GMAT数学题求解释啊！
If y is an integer and

, is y = 0?

(1)x ＜ 0

(2)y＜ 1

AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
CBOTH statement TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
DEACH statement ALONE is sufficient.
EStatements (1) and (2) TOGETHER are NOT sufficient.

求解为什么答案是D 题目里没有说X是整数呀，那当x>0 时，也有可能x<1/2,那么y<1 就不是充分条件了呀？求解诶！

作者: neverland8965 时间: 2013-4-30 18:06
y = |x| + x

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