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October 12th, 2011, 09:53 AM   #1
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Functional equation

Find all such functions defined on the set of real numbers and assuming real values that for any real the following equation is satisfied:

Could somebody help me solve this problem?

Thank you,

arnold is offline  
October 13th, 2011, 04:23 AM   #2
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This problem has already been posted here.
skipjack is offline  

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