| Author |
Comment/Response |
Peter Pein
|
 02/05/13 07:15am
Hi Bob,
there is no need to collect by powers of y:
In[1]:= poly=x+3 x^2+2 x^3-2 y+6 x y-5 x^2 y+8 x y^2-4 x^2 y^2;
c2=Coefficient[poly,y,2]
D[c2,x]
Out[2]= 8 x-4 x^2
Out[3]= 8-8 x
Have a look at the documentation for information about neat functions like CoefficientList or CoefficientArray!
Peter
URL: , |
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