Discrete Math - Practice Name: Unit 2 - Day 3 - Set Theory HW Period Date: 4. Show that A C B for the following problems: a. A = {1, 2), B = {3, 2, 1} 233 b. A = (1, 2), B = {x | x2 - 3x = - 2} C. A = {x | x2 - 12x + 36 = 0 }, B = {x / x2 - 3x - 18 = 0} 5. Prove that A 4 B for the following examples a. A = {1, 2), B = {3, 2, 4} b. A = { x 1 5