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by [email protected] » Mon May 07, 2012 12:30 am
"If x is negative, is x < -3 ?

(1) x^2 > 9
(2) x^3 < -9 "


I donot have the OA but when I solved the question, I got the answer as E. Is it correct? Could any of the experts please help?
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Source: — Data Sufficiency |
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by GmatKiss » Mon May 07, 2012 12:56 am
imo: D
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by mathbyvemuri » Mon May 07, 2012 12:59 am
statement(1): x^2 > 9 => x < -3 or x > 3
[spoiler]There is ambiguity here and hence, (1) alone is not sufficient[/spoiler]

statement(2): x^3 < -9 => x < -2.something
[spoiler]There is ambiguity again as it is asked whether x < -3. Hence, (2) alone is not sufficient[/spoiler]

But if we consider both the statements together, [spoiler]the common possible solution is: x < -3, which is sufficient and hence option "C"[/spoiler]
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by aneesh.kg » Mon May 07, 2012 1:15 am
Guys,
the answer is [spoiler](A)[/spoiler].

You can read it here:
https://www.beatthegmat.com/good-inequal ... tml#470202
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by Bill@VeritasPrep » Mon May 07, 2012 7:32 am
mathbyvemuri wrote:statement(1): x^2 > 9 => x < -3 or x > 3
[spoiler]There is ambiguity here and hence, (1) alone is not sufficient[/spoiler]

statement(2): x^3 < -9 => x < -2.something
[spoiler]There is ambiguity again as it is asked whether x < -3. Hence, (2) alone is not sufficient[/spoiler]

But if we consider both the statements together, [spoiler]the common possible solution is: x < -3, which is sufficient and hence option "C"[/spoiler]
Statement 1 works because the stem specifically mentions that x must be negative.
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by zueswoods » Mon May 07, 2012 8:07 am
I believe the answer is A

The if you draw the graphs you will get the solutions, also, remeber the question stem says X < 0 so X>3 is not an option.
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