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Topic: How to calculate the partial derivative?
Replies: 6   Last Post: Nov 21, 2012 5:17 AM

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Tang Laoya

Posts: 27
Registered: 11/21/12
How to calculate the partial derivative?
Posted: Nov 21, 2012 1:15 AM
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Dear all,

I am trying to calculate the partial derivative by mathematica, I have the following commands:



I got the following result:
DNex=b2 (a1+b1 x+c1 y)+b1 (a2+b2 x+c2 y)

How to do to have the following result?

DNex=b2*L1 + b1 * L2

Tang Laoya

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