If f ( x + y 8 , x - y 8 )= xy , then f (m, n) + f (n, m) = 0

Mathematics · JEE Advanced · NTA Exams — Sets, Relations and Functions

1. only when m = n
2. only when m ≠ n
3. only when m = – n
4. for all m and n

Answer

(D) for all m and n

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