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Jan 12th, 2018
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  1. r = x(x^2+y^2+z^2) gdzie x,z = const
  2.  
  3. Moim zdaniem (r)' = 2x^2 * y
  4.  
  5. r = (x^3+xy^2+xz^2)'
  6.  
  7. (xy^2)' = 2xy * (xy)' = 2xy * x = 2x^2 * y
  8. (x^3)' = 0
  9. (xz^2)' = 0
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