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What Are Sets?
A={Even Whole Numbers Between 1 and 11}
A={2,4,6,8,10}
Is 6 ∈ A?
Yes 6 ∈ A as 6 is an even whole number between 1 and 11.
Is 8 ∉ A?
No, 8 ∉ A is a wrong statement. This is because 8 is an even whole number between 1 and 11. So 8 ∈ A.
Union and Intersections
A={2,5,6,8,10,23,67,88,101,134}
B={1,6,7,10,34,67,76,96,101,155}
Write the set for A Union B.
A ∪ B = {1,2,5,6,7,8,10,23,34,67,76,88,96,101,134,155}
Write the set for A Intersect B.
A ∩ B = {6,10,67,101}
Venn Diagrams
A intersect B
B intersect (A union C)
Cartesian Product
Which of the following pairs is NOT an element in D x E ?
1. (6,13) 2. (9,7) 3. (10,15) 4. (1,22)
Answer: Number 3. (10,15)
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