You might have to use the triangle inequality here...
, since by the Triangle Inequality
.
A number is only ever less than its absolute value if it's negative, so
.
I understand, thanks a lot
Edit:Unfortunately, I think there is a problem with solving this question with triangle inequation.
When you write -(|x|+|3|) instead of -|x+3| it ruins the inequation because you subtract bigger number.
Last edited by msokol89; February 26th 2011 at 12:20 PM.
Reason: unresolved question