Question

Use set builder notation to give a description of each of these sets.

a) {3, 6, 9, 12}

b) {−4,−3,−2,−1, 0, 1, 2, 3, −4}

Answer 1

a. $\{x|x=3n,n=1,2,3,4\}$

b. $\{x\isin Z|-4\leq x\leq 4\}$