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![[Post New]](/templates/default/images/icon_minipost_new.gif) 27 Mar 2008 11:28:11 IST
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derivative of |f(x)| is f'(x) .|f(x)|/f(x) ...
which means that for derivative of log|x| = 1/|x| .d|x|/dx (using chain rule)
also derivative of |x| by above formula is |x|/x...
so answer is 1/x
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