absolute-value of an absolute-value equation. Please Help

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
tormomr
Posts: 2
Joined: Tue Sep 27, 2011 10:17 pm
Contact:

absolute-value of an absolute-value equation. Please Help

Postby tormomr » Tue Sep 27, 2011 10:27 pm

Is it posible : ||a+b||= |a| + |b| &/or
||a|+|b||=|a|+|b| ?
Is there some properties for those equations?

User avatar
stapel_eliz
Posts: 1734
Joined: Mon Dec 08, 2008 4:22 pm
Contact:

Postby stapel_eliz » Wed Sep 28, 2011 12:38 am

tormomr wrote:Is it posible : ||a+b||= |a| + |b| &/or
||a|+|b||=|a|+|b| ?
Is there some properties for those equations?

If you're asking if these equations are always true, then try plugging numbers in; specifically, see what happens when you plug negatives in for one or both of the variables.

if you're asking for general identities and properties of absolute values, then you should be able to find listings online, such as here. :wink:

tormomr
Posts: 2
Joined: Tue Sep 27, 2011 10:17 pm
Contact:

Re: absolute-value of an absolute-value equation. Please Hel

Postby tormomr » Wed Sep 28, 2011 2:59 am

tnks so much!! It really heped me.
But actually what I'm really want to know is if the absolute-value of an equation can have a superior absolute-value. And if the answere is positive where can i find it, becuse i've been lookign after that the whole day and all I get is the usual properties and identities.

Pleas Help!!

User avatar
stapel_eliz
Posts: 1734
Joined: Mon Dec 08, 2008 4:22 pm
Contact:

Postby stapel_eliz » Wed Sep 28, 2011 10:59 am

tormomr wrote:...actually what I'm really want to know is if the absolute-value of an equation can have a superior absolute-value. And if the answere is positive where can i find it....

I'm sorry, but I don't know what this means...? How does your book define a ''superior" absolute value? What do you mean when you ask "where" answers are? ("Answers" to what?) :confused:


Return to “Intermediate Algebra”