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Query regarding Function

  • To: mathgroup at
  • Subject: [mg130126] Query regarding Function
  • From: Rahul Chakraborty <rahul.6sept at>
  • Date: Tue, 12 Mar 2013 00:35:32 -0400 (EDT)
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Dear all,

Case1:  In the following code


 The output is found to be  b^2+2 xy

Case2:  But for the code


 The output is 2 a+b^2

 Hence my query is why in case 1 x*y is not replaced by b and a whereas in case 2 it got replaced ?


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