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