Roster Form :
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Listing the elements of a set inside a pair of braces { } is called the roster form.
(i) Let A be the set of even natural numbers less than 11.
In roster form we write A = {2, 4, 6, 8, 10}
(ii) A = {x : x is an integer and- 1≤ x < 5}
In roster form we write A = {-1, 0,1, 2, 3, 4}
Let us look into some examples in roster form.
Set Builder Form :
Set-builder notation is a notation for describing a set by indicating the properties that its members must satisfy.
Reading Notation :
‘|'or ‘:' such that
A = { x : x is a letter in the word dictionary }
We read it as
'A is the set of all x such that x is a letter in the word dictionary'
For example,
(i) N = 'x : x is a natural number,
(ii) P = 'x : x is a prime number less than 100,
(iii) A = 'x : x is a letter in the English alphabet,
Here we are going to see examples on roster form and set builder form.
Roster Form Examples
Example 1 :
List the elements of the following set in Roster form:
The set of all positive integers which are multiples of 7
Solution :
The set of all positive integers which are multiples of 7 in roster form is
{7, 14, 21, 28,...}
Example 2 :
List the elements of the following set in Roster form:
The set of all prime numbers less than 20.
Solution :
https://trueaup792.weebly.com/nuance-company.html. The set of all prime numbers less than 20 in roster form is
{2, 3, 5, 7, 11, 13, 17, 19}
Example 3 :
Write the set A = { x : x is a natural number ≤ 8} in roster form.
Solution :
A = { x : x is a natural number ≤ 8}.
So, the set contains the elements 1, 2, 3, 4, 5, 6, 7, 8.
Hence in roster form A = {1, 2, 3, 4, 5, 6, 7, 8}
Example 4 :
Write the following set in roster form
A = {x : x ∈ N, 2 < x ≤ 10}
Solution :
A = {x : x ∈ N, 2 < x ≤ 10}
Set A will contain elements greater than 2 and less than or equal to 10.
A = { 3, 4, 5, 6, 7, 8, 9, 10}
Example 5 :
Write the following set in roster form
X = {x : x = 2n, n ∈ N and n ≤5}
Solution :
X = {x : x = 2n, n ∈ N and n ≤5}
To find the elements in the given set, we need to apply the values 1, 2, 3, 4 ,5 respectively instead of n.
n = 1 x = 2n x = 21 x = 2 | n = 2 x = 2n x = 22 x = 4 | n = 3 x = 2n x = 23 x = 8 | n = 4 x = 2n x = 24 x = 16 | n = 5 x = 2n x = 25 x = 32 |
Roster 1 2 1 – Flexible Name Generator No Human
X = { 2, 4, 8, 16, 32}
Set Builder Form Examples
Example 1 :
Represent the following sets in set-builder form
X = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
Solution :
X = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
The set X contains all the days of a week.
Hence in set builder form, we write
X = { x : x is a day in a week }
Example 2 :
Represent the following sets in set-builder form
A = {1, 1/2, 1/3, 1/4, ....}
Solution :
Playerunknowns battlegrounds online. A = {1, 1/2, 1/3, 1/4, ....}
The denominators of the elements are 1, 2, 3, 4, ..
The set-builder form is A = { x : x ,1/n, n ∈ N }
Example 3 :
Write the following sets in Set-Builder form
The set of all positive even numbers
Solution :
A = The set of all positive even numbers
The set-builder form is
A = { x : x is a positive even number}
Example 4 : Osfoora for twitter 1 3.
Write the following sets in Set-Builder form
The set of all whole numbers less than 20
Solution :
A = The set of all whole numbers less than 20
The set-builder form is
A = {x : x is a whole number and x < 20}
Write the following set in roster form
X = {x : x = 2n, n ∈ N and n ≤5}
Solution :
X = {x : x = 2n, n ∈ N and n ≤5}
To find the elements in the given set, we need to apply the values 1, 2, 3, 4 ,5 respectively instead of n.
n = 1 x = 2n x = 21 x = 2 | n = 2 x = 2n x = 22 x = 4 | n = 3 x = 2n x = 23 x = 8 | n = 4 x = 2n x = 24 x = 16 | n = 5 x = 2n x = 25 x = 32 |
Roster 1 2 1 – Flexible Name Generator No Human
X = { 2, 4, 8, 16, 32}
Set Builder Form Examples
Example 1 :
Represent the following sets in set-builder form
X = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
Solution :
X = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
The set X contains all the days of a week.
Hence in set builder form, we write
X = { x : x is a day in a week }
Example 2 :
Represent the following sets in set-builder form
A = {1, 1/2, 1/3, 1/4, ....}
Solution :
Playerunknowns battlegrounds online. A = {1, 1/2, 1/3, 1/4, ....}
The denominators of the elements are 1, 2, 3, 4, ..
The set-builder form is A = { x : x ,1/n, n ∈ N }
Example 3 :
Write the following sets in Set-Builder form
The set of all positive even numbers
Solution :
A = The set of all positive even numbers
The set-builder form is
A = { x : x is a positive even number}
Example 4 : Osfoora for twitter 1 3.
Write the following sets in Set-Builder form
The set of all whole numbers less than 20
Solution :
A = The set of all whole numbers less than 20
The set-builder form is
A = {x : x is a whole number and x < 20}
Example 5 :
Write the following sets in Set-Builder form
The set of all positive integers which are multiples of 3
Solution :
A = The set of all positive integers which are multiples of 3
The set-builder form is
A = {x : x is a positive integer and multiple of 3}
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The Best Roster Generator for Your Business
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Packed with powerful scheduling and reporting features, Snap Schedule roster generator helps you create optimal staff rota, monitor and control labour costs, manage vacations and holiday leaves, ensure adequate shift coverage, and eliminate scheduling conflicts — all from a modern Microsoft Office® user interface. It gives you instant access to key decision-making criteria, including staffing requirements, overtime and on-call hours, labour costs, skills and certifications, employee availability and preferences, and more.
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