Question

If A is an empty set and B is a set of vowels then AUB​

Answer 1

Answer:

1.1.4 Subsets A set A is said to be a subset of set B if every element of A is also an

element of B. In symbols we write A ⊂ B if a ∈ A ⇒ a ∈ B.

We denote set of real numbers by R

set of natural numbers by N

set of integers by Z

set of rational numbers by Q

set of irrational numbers by T

We observe that

N ⊂ Z ⊂ Q ⊂ R,

T ⊂ R, Q ⊄ T, N ⊄ T

1.1.5 Equal sets Given two sets A and B, if every elements of A is also an element of

B and if every element of B is also an element of A, then the sets A and B are said to

be equal. The two equal sets will have exactly the same elements.

1.1.6 Intervals as subsets of R Let a, b ∈ R and a < b. Then

(a) An open interval denoted by (a, b) is the set of real numbers {x : a < x < b}

(b) A closed interval denoted by [a, b] is the set of real numbers {x : a ≤ x ≤ b