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abs value

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CEO
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abs value [#permalink] New post 02 Mar 2008, 22:42
can someone explain this to me. I dont understand the logic behind it.

how do we go from
|x| = |y|
to
x/y = |1|
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Re: abs value [#permalink] New post 03 Mar 2008, 00:35
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|x| = |y| means x=+-y or y=+-X
so in any case x/y=+-1
CEO
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Re: abs value [#permalink] New post 03 Mar 2008, 00:44
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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Re: abs value [#permalink] New post 03 Mar 2008, 01:03
You can say that |x/y| = 1 as long as x and y are not both 0, but not that x/y = | 1 |.
CEO
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Re: abs value [#permalink] New post 03 Mar 2008, 06:40
|x| = |y|

|x|/|y| = 1

|x/y| = 1

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

x/y = |1|
correct?
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Re: abs value   [#permalink] 03 Mar 2008, 06:40
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