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标题: GWD 18 - 22 [打印本页]

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作者: conquergmat    时间: 2005-12-15 12:04
标题: GWD 18 - 22

Q22:
If –2x > 3y, is x negative?
(1)   y > 0
(2)   2x + 5y – 20 = 0

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.

选D

why (2) can be sufficient

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作者: conquergmat    时间: 2005-12-15 14:01
up

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作者: sakana    时间: 2005-12-15 16:21

以下是引用conquergmat在2005-12-15 12:04:00的发言：

Q22:
If –2x > 3y, is x negative?
(1)   y > 0
(2)   2x + 5y – 20 = 0

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.

选D

why (2) can be sufficient

画直角坐标就会发现

2X+5y-20=0

-2X>3y

两者重迭区 x必小于0

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作者: conquergmat    时间: 2005-12-15 16:33
thanks

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