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		   4 items are filed under this topic. 
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    Heat equation | 
  2017-11-23 | 
   
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  From Max: What does du\dt=a(triangle)^2u mean. Can it be solved for t. Answered by Penny Nom. | 
   
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    Partial derivatives | 
  2009-01-17 | 
   
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  From Meghan: I have a question I've been working at for a while with maxima/minima of partial derivatives.
  
"Postal rules require that the length + girth of a package (dimensions x, y, l) cannot exceed 84 inches in order to be mailed.
Find the dimensions of the rectangular package of greatest volume that can be mailed.
(84 = length + girth = l + 2x + 2y)" Answered by Harley Weston. | 
   
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    A partial derivative | 
  2004-03-19 | 
   
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  From Penny Nom: Is it possible to differentiate the following equation, if so could
you please explain.
  
S=SQRT(T-(5/X^2))
  
 I would like the derivative of S with respect to X. Answered by Harley Weston. | 
   
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    Derivées partielle | 
  1999-10-19 | 
   
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  From Arnaud Flandin: Quel est la definition des derivées partielle  Answered by Claude Tardif. | 
   
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