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I need help with this question. Let f : N N be a function with the property that f (1) = 2 and f (

I need help with this question. Let f : NN be a function with the property that f(1) = 2 and f(a + b) = f(a) f(b) for all a, b N. Prove by induction that f(n) = 2ⁿfor all n N.

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