Cho 2 tập A, B rời nhau với |A|=12, |B|=18, |A∪B| là:

8

5

7

A x B = B x A

|A x B| = |B x A|

|A x B| = |A| x |B|

{(1, a), (1, 1), (2, a)}

{(2, 2), (2, 3), (3, b)}

{(1, 2), (2, 2), (3, a)}

f(x) = x² − 2x + 1

f(x) = x⁴ + x² + 1

298

4950

50

9900

{(1,2),(1,4),(2,3),(2,5)}

{(1,1),(2,2),(3,3),(4,4),(5,5), (1,2),(1,4),(2,3),(2,5)}

{(1,2),(2,1),(1,4),(4,1), (2,5), (5,2)}

{(1,2),(2,1),(1,4),(4,1), (2,5), (5,2),(3,4),(4,3),(2,3),(3,2),(4,5),(5,4)}

Phản xạ

Đối xứng

Bắc cầu

Phản đối xứng

{(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6), (3, 4), (4, 3), (5, 6), (6, 5)}

{(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6), (1, 2), (2, 1), (3, 4), (4, 3)}

{(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6), (2, 3), (3, 2), (4, 5), (5, 4)}

{(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6), (4, 5), (5, 4), (1, 2), (2, 1), (1, 3), (3, 1)}

{(1,1), (1,2), (1,3), (2,2), (2,1), (2,3), (3,3), (1,5), (5,1)}

{(1,1), (2,2), (3,3), (4,4), (5,5), (1,2), (2,1), (1,3), (3,1)}

{(1,1), (1,2), (2,1), (2,2), (3,3), (4,4)}

{(1,1), (2,2), (3,3), (4,4), (5,5), (2,1), (1,2), (3,4), (4,3)}

{-9, -5, -1, 3, 7, 10}

{-11, -7, -3, 1, 5, 9}

{-11, -3, 1, 3, 9}

{-9, 6, 1, -8, 3, -5, 0, -12}