y ∈ N such that f(1) = 3 and n ∑ x = 1 f(x) = 120

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7. If f is a function satisfying f (x +y) = f(x) f(y) for all x, y ∈ N such that f(1) = 3 and n ∑ x = 1 f(x) = 120 , find the value of n.
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7. If f is a function satisfying f (x +y) = f(x) f(y) for all x, y ∈ N such that f(1) = 3 and n ∑ x = 1 f(x) = 120 , find the value of n. 7. If f is a function satisfying f (x +y) = f(x) f(y) for all x [...]
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Tags: 7. If f is a function satisfying f (x +y) = f(x) f(y) for all x , find the value of n. , y ∈ N such that f(1) = 3 and n ∑ x = 1 f(x) = 120 ,