Let the domain be
i. The set of all natural numbers
ii. The set of all real numbers
i. The set of all natural numbers
Note that the smallest natural number that satisfies this inequality is 13 and there is no biggest natural number which satisfies the inequality.
Hence, the range is {13, 14, 15, ...}
ii. The set of all real numbers
Clearly, the set of all real numbers that satisfies this inequality is the open interval (12.4, ∞).
