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Let A = {9, 10, 11, 12, 13} and $f : A \to N$ be defined by f(n) = highest prime factor of n, then its range is

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{13}

{3,5,11,13}

{11,13}

{2,3,5,11}

answer is B.

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Detailed Solution

f(9) = 3, f(10) = 5, f(11) = 11, f(12) = 3, f(13) = 13

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