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- Sets Definition. In mathematics, a set is defined as a well-defined collection of objects. Sets are named and represented using capital letters. In the set theory, the elements that a set comprises can be any kind of thing: people, letters of the alphabet, numbers, shapes, variables, etc.
- Representation of Sets in Set Theory. There are different set notations used for the representation of sets in set theory. They differ in the way in which the elements are listed.
- Sets Symbols. Set symbols are used to define the elements of a given set. The following table shows the set theory symbols and their meaning. Symbols. Meaning.
- Types of Sets. There are different types of sets in set theory. Some of these are singleton, finite, infinite, empty, etc. Singleton Sets. A set that has only one element is called a singleton set or also called a unit set.
Jul 19, 2024 · A set is a collection of well-defined objects that share some common property. It can be a group of any items, such as the names of the months in a year, the days in a week, or a list of variables or constants. Sets are named and represented in capital letters. Here are some examples of sets: A = {-5, -3, -1, 1, 3, 5} B = {2, 3, 5, 7, 11, 13, …}
Theorem 1.1.1 1.1. 1. Two sets A A and B B are equal if and only if A ⊂ B A ⊂ B and B ⊂ A B ⊂ A. If A ⊂ B A ⊂ B and A A does not equal B B, we say that A A is a proper subset of B B, and write A ⊊ B A ⊊ B. The set θ = {x: x ≠ x} θ = {x: x ≠ x} is called the empty set. This set clearly has no elements.
- What Is A Set?
- Set Definition
- Elements of A Set
- Representation of Sets
- Visual Representation of Sets Using Venn Diagram
- Sets Formulas
- Solved Examples
We commonly use the terms like ‘a complete set of novels’ or ‘a set of cutlery’ in day-to-day life. What do we mean by the term ‘set’ here? It simply defines a collection of objects or things of the same type. Sets in math are also defined in the similar context.
In mathematics, a set is defined as a collection of distinct, well-defined objects forming a group. There can be any number of items, be it a collection of whole numbers, months of a year, types of birds, and so on. Each item in the set is known as an element of the set. We use curly brackets while writing a set. Consider an example of a set. A={1,...
Elements or members are the terms or items present in a set. They are enclosed in curly brackets and separated by commas. To represent that an element is contained in a set, we use the symbol “∈.” It is read as ‘belongs to.’ Suppose we have a set of even natural numbers less than 10. A={2,4,6,8}. Here, 2∈A but 3∉A.
We represent the sets in different ways. The only difference is in the way in which the elements are listed. The different forms of representing sets are discussed below.
The pictorial representation of sets represented as circles is known as the Venn diagram. The elements of the sets are inside the circles. The rectangle that encloses the circles represents the universal set. The Venn diagram represents how the sets are related to each other.
There are some set formulas that we can use to find the number of elements. For sets A and B, 1. n(AUB)=n(A)+n(B)–n(A∩B) 2. n(A−B)=n(AUB)−n(B) 3. n(A−B)=n(A)−n(A∩B)
1. How many elements are there in the set A={x:xis a perfect square less than 30}? Solution: A={1,4,9,16,25} n(A)=5 2. Arrange the set A={y:y2=36;yis an integer}in roster form. Solution: y2=36⇒y2−36=0⇒y=±6 A=–6,6 3. Write the set B={1,2,5,10,17}in set builder form. Solution: 02+1=1 12+1=2 22+1=5 32+1=10 42+1=17 So, in roaster form B={y:y2+1,y<5} 4....
Jan 24, 2021 · Suppose set A = {1,3,5} and set B = {5,5,3,3,1,1}. Sets A and B are equal because they contain the exact same elements, namely 1, 3, and 5. Remember, order and multiplicity of elements don’t matter. Let’s look at another example. Determine if the sets A and B are equal.
In sets it does not matter what order the elements are in. Example: {1,2,3,4} is the same set as {3,1,4,2} When we say order in sets we mean the size of the set. Another (better) name for this is cardinality. A finite set has finite order (or cardinality). An infinite set has infinite order (or cardinality).
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1. Write a set consisting of four small hand tools that might be in a toolbox and label it with a capital /**/T/**/. All the sets we have considered so far have been well-defined sets. A well-defined set clearly communicates whether an element is a member of the set or not.
