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Find-all-the-real-valued-f-satisfying-f-2x-f-2y-f-f-y-4x-8y-for-all-real-numbers-x-and-y-




Question Number 53842 by Tawa1 last updated on 26/Jan/19
Find all the real valued  f  satisfying                                f[2x + f(2y)] + f[f(y)]  =  4x + 8y  for all real numbers  x and y.
Findalltherealvaluedfsatisfyingf[2x+f(2y)]+f[f(y)]=4x+8yforallrealnumbersxandy.

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