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If f(x+y)=f(x)f(y) and ∞∑x=1f(x)=2,x,y ∈ N, where N is the set of all natural numbers, then the value of f(4)f(2) is: |
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Answer» If f(x+y)=f(x)f(y) and ∞∑x=1f(x)=2,x,y ∈ N, where N is the set of all natural numbers, then the value of f(4)f(2) is: |
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