Can someone solve this problem? PROVE: For any real numbers a and b ||a|-|b||≤ |a-b|
Last edited by mr fantastic; Sep 21st 2010 at 02:43 AM. Reason: Deletd duplicate question, re-titled.
Follow Math Help Forum on Facebook and Google+
You need to know the triangular inequality. . Since . If we take the modulus of both sides, we have .
Last edited by mr fantastic; Sep 21st 2010 at 02:44 AM.
View Tag Cloud