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[Data Sufficiency]
试题详情
题目：
If I and k are lines in the xy-plane, is the product of the slopes of l and k equal to -1 ?
(1) Line I passes through the origin and the point (1, 2).
(2) Line k has x-intercept 4 and y-intercept 2.
(1) Line I passes through the origin and the point (1, 2).
(2) Line k has x-intercept 4 and y-intercept 2.
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:
C
提问：
@徐小梅。老师，这道题为什么加起来可以？难道不需要考虑斜率的正负嘛？
解答：
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提问：
@徐小梅。老师，这道题为什么加起来可以？难道不需要考虑斜率的正负嘛？
解答：
点赞0
阅读2115
提问：
DS
解答：
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