Question:
Let $X=\{12,13,14,15,16,17\}$ and $f: A \rightarrow Z: f(x)=$ highest prime factor of $x$.
Find range (f)
Solution:
Given: f(x) = highest prime factor of x
And since $x \in A, A=\{12,13,14,15,16,17\}$
Value of $x$ can only be $12,13,14,15,16,17$
Doing prime factorization of the above, we get
Hence, range of f = {2, 3, 5, 7, 13, 17}
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