JEE Main 2019 Mathematics question

MathematicsSequence and SeriesJEE Main 2019

Let , where the function f satisfies f(x + y) = f(x)f(y) for all natural numbers x, y and f(1) = 2. Then the natural number 'a' is:

Answer: (B)

Solution

; ⇒ , a = 3.

Question ID VK-009460