Question

find the range of the function f. question 4

Answer 1

f(9)=3. 9=1×3×3
highest prime factor of 9 is 3
f(10)=5. 10=2×5
f(11)=11
f(12)=3. 12=2×2×3
f(13)=13

Range of f(n)={3,5,11,13}