Page 5 - (E-Book) Math

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ตัวอย่าง ก าหนดเซต A และ B จงหา A  B

1) ก าหนด A = {3, 9}

B = {4, 6, 7}

A  B = {3, 4, 6, 7, 9}

2) ก าหนด A = {6, 7, 8, 9}

B = {5, 7, 9}

A  B = {5, 6, 7, 8, 9}

3) ก าหนด A = {1, 2, 3, 4, 5}

B = {1, 2, 5}

A  B = {1, 2, 3, 4, 5}

4) ก าหนด A = {3, 6, 8}

B = {3, 6, 8}

A  B = {3, 6, 8}