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# Is |x| < 1?

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Senior Manager
Joined: 15 May 2011
Posts: 280
Location: Costa Rica
GMAT 1: 710 Q42 V45
GMAT 2: 740 Q48 V42
GPA: 3.3
WE: Research (Consulting)
Followers: 18

Kudos [?]: 136 [0], given: 134

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29 Aug 2012, 10:11
1
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Difficulty:

75% (hard)

Question Stats:

41% (02:10) correct 59% (01:14) wrong based on 34 sessions

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Is lxl < 1?

1) lx + 1l = 2 lx-1l
2) lx-3l
[Reveal] Spoiler: OA

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Work experience (as of June 2012)
2.5 yrs (Currently employed) - Mckinsey & Co. (US Healthcare Analyst)
2 yrs - Advertising industry (client servicing)

Senior Manager
Joined: 15 May 2011
Posts: 280
Location: Costa Rica
GMAT 1: 710 Q42 V45
GMAT 2: 740 Q48 V42
GPA: 3.3
WE: Research (Consulting)
Followers: 18

Kudos [?]: 136 [0], given: 134

Re: Inequality subbing in values [#permalink]

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29 Aug 2012, 10:13
good question, i missed subbing in 1/3 for x and only came up with 3 as a possible value to begin with.. Thus picked A first..
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Work experience (as of June 2012)
2.5 yrs (Currently employed) - Mckinsey & Co. (US Healthcare Analyst)
2 yrs - Advertising industry (client servicing)

Director
Joined: 22 Mar 2011
Posts: 612
WE: Science (Education)
Followers: 101

Kudos [?]: 947 [0], given: 43

Re: Inequality subbing in values [#permalink]

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29 Aug 2012, 10:29
Aximili85 wrote:
Is lxl < 1?

1) lx + 1l = 2 lx-1l
2) lx-3l

Statement (2) is not clear: what about absolute value of x - 3?
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PhD in Applied Mathematics
Love GMAT Quant questions and running.

Manager
Joined: 23 Jan 2011
Posts: 127
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Kudos [?]: 81 [0], given: 13

Re: Inequality subbing in values [#permalink]

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29 Aug 2012, 12:12
Hi, I'm terribly sorry, the 2nd part should be lx-3l NOT EQUAL to 0, so re-pasting question
Is lxl < 1?

1) lx + 1l = 2 lx-1l
2) lx-3l NOT EQUAL to 0
Math Expert
Joined: 02 Sep 2009
Posts: 38862
Followers: 7728

Kudos [?]: 106081 [0], given: 11607

Re: Inequality subbing in values [#permalink]

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30 Aug 2012, 01:48
Aximili85 wrote:
Is lxl < 1?

1) lx + 1l = 2 lx-1l
2) lx-3l

Is |x| < 1?

(1) |x + 1| = 2|x - 1|
(2) |x - 3| ≠ 0

Discussed here: is-x-1-1-x-1-2-x-1-2-x-82478.html

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Re: Inequality subbing in values   [#permalink] 30 Aug 2012, 01:48
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