for "a" and "b" are real numbers prove that: ImageShack - Image Hosting :: 34860604zw7.gif
Last edited by transgalactic; November 25th 2008 at 09:22 AM.
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first we have |a-b|>=||a|-|b|| what did you do at the first step in order to transform it into http://img152.imageshack.us/img152/5374/52524050qr2.gif
That is a simple application of the triangle inequality. In fact, the entire problem depends upon the triangle inequality. It also depends upon the general fact .
can you tell me what operation you did in each step of this prove ??
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