2026-09-08

Exercises for Section 1.3

Source: Richard Hammack, The Book of Proof, 3rd ed., “Exercises for Section 1.3” (p. 15).

A. List all the subsets of the following sets.

• 2. \(\{1,2,\emptyset\}\)

Exercises for Section 1.2

Source: Richard Hammack, The Book of Proof, 3rd ed., “Exercises for Section 1.2” (p. 11).

A. Write out the indicated sets by listing their elements between braces.

• 1. Suppose \(A=\{1,2,3,4\}\) and \(B=\{a,c\}\).

  • (a) \(A\times B\)

  • (e) \(\emptyset\times B\)