Problem 3.3. (a) Prove that if a and c are odd integers, then ab + bc is even for every integer b. (b) Let x € Z. Prove
Posted: Thu Jun 30, 2022 7:41 pm
Problem 3.3. (a) Prove that if a and c are odd integers, then ab + bc is even for every integer b. (b) Let x € Z. Prove that if 22x is an odd integer, then 2-2x is an odd integer.