Is xy > 0 ?
(1) x - y > -2
(2) x - 2y < -6
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
这道题好扯,不是gmat的题,联立也有两种可能,如果y分别取-3,-1,1,3的话
同时满足1\2条件的y只能大于3
登录 或 注册 后可以参加讨论