On the number line, the distance between x and y is greater than the distance between x and z. Does z lie between x and y on the number line?
(1) xyz < 0
(2) xy < 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.
画数轴的方法是最简单的了,但是我忘了x和y的大小也是不确定的。。。
(1),xyz的情况要么是正正负,要么是负负负;不充分
(2),xy一正一负,不充分
(1)+(2),z为正数,xy一正一负,但谁正谁负不清楚,不充分
【错误的原因:注意x,y谁大谁小也不知道】
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