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Concept: Absolute value "invalids"

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Concept: Absolute value "invalids" [#permalink] New post 19 Nov 2007, 09:18
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|x-4| = x

looking at the positive scenario only

x-4=x
x=x+4
0=4 ???
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Re: Concept: Absolute value "invalids" [#permalink] New post 19 Nov 2007, 10:29
bmwhype2 wrote:
|x-4| = x

looking at the positive scenario only

x-4=x
x=x+4
0=4 ???


Only one scenario here x=2

:)
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Re: Concept: Absolute value "invalids" [#permalink] New post 19 Nov 2007, 10:54
bmwhype2 wrote:
|x-4| = x

looking at the positive scenario only

x-4=x
x=x+4
0=4 ???


That means there is no solution for x >= 4 (as |x-4| = x-4 when x>=4). :)
Re: Concept: Absolute value "invalids"   [#permalink] 19 Nov 2007, 10:54
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Concept: Absolute value "invalids"

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