Data Sufficiency

试题详情

题目:

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

D

提问:

请问May,图片中的不等式与二次函数图形相结合的例1,求出条件一和条件二的判别式结果都小于零,然后再怎么继续推理是否x²>y呢?两个条件的判别式都小于零,为什么条件一不充分,条件二充分呢?谢谢。[img=/resource/2018-09/13466-1537722401.png]
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提问:

请问一下May,图片中练习2为何选C呢?两个条件结合起来看时,也至少有大于和等于两种情况了,为何不是选E呢?谢谢。[img=/resource/2018-09/13466-1537726064.png]
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