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Topic: Want help in linear algebra
Replies: 3   Last Post: Jun 21, 2013 6:03 PM

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 robh Posts: 5 From: Arizona Registered: 6/21/13
Re: Want help in linear algebra
Posted: Jun 21, 2013 12:55 PM

On 6/20/13 Justin Tsui wrote:

> Can someone tell me why x1+5*x2-sqrt(2*x3)=1 is a
> linear equation? For I check the definition of a
> linear equation:"All variables only to the first
> power and do not appear", and in this case the power
> of variable x3 is 1/2, not meeting the definition,
> but why is this equation still be regarded as a
> linear equation? Thanks.

**************

I would like to see the source information.
Suspect a typo: might the right-hand parenthesis be misplaced? If so, then perhaps the intended
expression was: x1 + 5*x2 - sqrt(2)*x3 = 1

Date Subject Author
6/20/13 Justin Tsui
6/21/13 grei
6/21/13 robh
6/21/13 Justin Tsui