Data Sufficiency

试题详情

题目:

In the xy-plane, does the line with equation y = 3x + 2 contain the point (r, s) ?
(1) (3r + 2 – s)(4r + 9 – s) = 0
(2) (4r – 6 – s)(3r + 2 – s) = 0

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:

请May老师解答一下,这题应该怎么解呢?条件里面都是曲线,可是无法快速判断,题干的直线是不是曲线的切线
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