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Consider a real-valued function f(x) sat...

Consider a real-valued function f(x) satisfying `2f(x y)=(f(x))^y+(f(y))^xAAx , y in Ra n df(1)=a ,w h e r ea!=1.` Prove that `(a-1)` `sum_(i=1)^nf(i)=a^(n+1)-a`

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