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Very important....
Let R denote the set of real numbers. Find all nondecreasing continuous
functions g : R → R such that
g(x+g(y))=g(g(x))+g(y) for all x,y∈R
Let R denote the set of real numbers. Find all nondecreasing continuous
functions g : R → R such that
g(x+g(y))=g(g(x))+g(y) for all x,y∈R