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# abs value

Author Message
CEO
Joined: 21 Jan 2007
Posts: 2734

Kudos [?]: 1075 [0], given: 4

Location: New York City

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02 Mar 2008, 23:42
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can someone explain this to me. I dont understand the logic behind it.

how do we go from
|x| = |y|
to
x/y = |1|
_________________

You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson

Kudos [?]: 1075 [0], given: 4

Senior Manager
Joined: 28 Feb 2007
Posts: 300

Kudos [?]: 44 [1], given: 0

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03 Mar 2008, 01:35
1
KUDOS
|x| = |y| means x=+-y or y=+-X
so in any case x/y=+-1

Kudos [?]: 44 [1], given: 0

SVP
Joined: 29 Aug 2007
Posts: 2471

Kudos [?]: 853 [0], given: 19

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03 Mar 2008, 01:44
bmwhype2 wrote:
can someone explain this to me. I dont understand the logic behind it.

how do we go from
|x| = |y|
to
x/y = |1|

x/y could be 1 or -1. therefore is l1l.
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Kudos [?]: 853 [0], given: 19

GMAT Instructor
Joined: 04 Jul 2006
Posts: 1259

Kudos [?]: 341 [0], given: 0

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03 Mar 2008, 02:03
You can say that |x/y| = 1 as long as x and y are not both 0, but not that x/y = | 1 |.

Kudos [?]: 341 [0], given: 0

CEO
Joined: 21 Jan 2007
Posts: 2734

Kudos [?]: 1075 [0], given: 4

Location: New York City

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03 Mar 2008, 07:40
|x| = |y|

|x|/|y| = 1

|x/y| = 1

x/y = 1
-(x/y) = 1 --> x/y = -1

x/y = |1|
correct?
_________________

You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson

Kudos [?]: 1075 [0], given: 4

Re: abs value   [#permalink] 03 Mar 2008, 07:40
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# abs value

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