Suppose that a function f: R → R satisfies f(x+y)= f(x) f(y) for all x, y ∈ R and f(1)=3. If ∑_i=...

Suppose that a function f: R → R satisfies f(x+y)= f(x) f(y) for all x, y ∈ R and f(1)=3. If ∑_i=1^n f(i)=363, then n is equal to [JEE Main-2020 (September)]

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