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December 6th, 2014, 05:34 AM  #1 
Newbie Joined: Dec 2014 From: Malaysia Posts: 4 Thanks: 0 Math Focus: Calculus  About partial differentiation with arbitary function I want to ask for the question , i dont quite understand what is all about for this example 4 , need explanations , thank you . Plus , I want to ask how to determine whether the partial differentiation shows maximum or minimum by just seeing the equation without doing anything others ( like finding the critical points . ) 

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arbitary, differentiation, function, partial 
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