Well I m Very Sorry For Posting this Problem after a month or more.
This is A problem from the topic Functions. This is not very difficult and not quiet easy.
Q. Let N Be The Set of Positive Integers. Determine All the Functions g : N ---> N Such that
(g(m)+n) (m+g(n))
Is a Perfect Square for all m,n belongs to N.
This Might not Impress you But You can try it. :)
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