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If f (x) is a function satisfying f (x +...

If f (x) is a function satisfying `f (x + y) = f (x) f (y) AA x, y in N,` such that f (1) = 3 and `sum_(x=1) ^(n) f (x) = 120,` then the value of n is

A

4

B

5

C

6

D

None of these

Text Solution

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The correct Answer is:
A
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