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Exercise 5 - Chapter 1

edited April 2018 in Exercises

Let \(A := \{h, 1\}\) and \(B := \{1, 2, 3\}\).

  1. There are eight subsets of \(B\); write them out.
  2. There are six elements in \(A \times B\); write them out.

Comments

  • 1.

    Here is my solution to the first part.

    1. \( \{ \}, \{ 1 \}, \{ 2 \}, \{ 3 \}, \{ 1, 2 \}, \{ 1, 3 \}, \{ 2, 3 \}, \{ 1, 2, 3 \} \).
    Comment Source:Here is my solution to the first part. 1. \\( \\{ \\}, \\{ 1 \\}, \\{ 2 \\}, \\{ 3 \\}, \\{ 1, 2 \\}, \\{ 1, 3 \\}, \\{ 2, 3 \\}, \\{ 1, 2, 3 \\} \\).
  • 2.
    edited July 2018

    2: \(A \times B = \{(h,1), (h,2), (h,3), (1,1), (1,2), (1,3)\} \)

    Comment Source:2: \\(A \times B = \\{(h,1), (h,2), (h,3), (1,1), (1,2), (1,3)\\} \\)
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