If zy < xy < 0, is |x - z| + |x| = |z| ?
(1) z < x
(2) y > 0
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.
虽然做对了但是觉得很奇怪。 这道题似乎根本不需要条件(1)或者(2)都能恒成立啊?由题目知y不为0,分情况:当 y>0时,z
登录 或 注册 后可以参加讨论