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 Post subject: Does |x|=x?Posted: Thu, 26 Jan 2012 23:29:37 UTC
 S.O.S. Oldtimer

Joined: Sat, 21 Jan 2012 03:59:22 UTC
Posts: 182
Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

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 Post subject: Re: Does |x|=x?Posted: Thu, 26 Jan 2012 23:44:01 UTC
 Senior Member

Joined: Thu, 21 Apr 2011 03:44:05 UTC
Posts: 57
Location: Depends where I am
DgrayMan wrote:
Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

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 Post subject: Re: Does |x|=x?Posted: Fri, 27 Jan 2012 00:10:40 UTC
 Member of the 'S.O.S. Math' Hall of Fame

Joined: Sun, 22 Jun 2003 18:00:06 UTC
Posts: 3461
Location: North TX
DgrayMan wrote:
Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

if

if

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 Post subject: Re: Does |x|=x?Posted: Fri, 27 Jan 2012 06:35:21 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
DgrayMan wrote:
Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

The question doesn't make any sense, what is x? If we're being REALLY pedantic, I could even ask what is |*|, but since this is the algebra forum, I'll not go into other absolute values. Still, if x is a non-real complex number, it is neither of those things.

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