tell me about roaster form for sets
Answers
Answer:
In representation of a set the following three methods are commonly used:
(i) Statement form method
(ii) Roster or tabular form method
(iii) Rule or set builder form method
1. Statement form:
In this, well-defined description of the elements of the set is given and the same are enclosed in curly brackets.
For example:
(i) The set of odd numbers less than 7 is written as: {odd numbers less than 7}.
(ii) A set of football players with ages between 22 years to 30 years.
(iii) A set of numbers greater than 30 and smaller than 55.
(iv) A set of students in class VII whose weights are more than your weight.
Answer.
- Mathematics Roster Form - I
Set:
A set is a collection of well defined objects. We write sets either in the Roster form or in the set builder form.
Roster Form:
This method is also known as tabular method. In this method, a set is represented by listing all the elements of the set, the elements being separated by commas and are enclosed within flower brackets { }.
Example:
A is a set of natural numbers which are less than 6.
Solution:
A = {1,2,3,4,5} is the Roster form.
Directions: Write the given sets in Roster form. Also write at least ten examples of your own.
Q 1: Q is a set of whole numbers.
Q = {1,2,3,4,5,........}
Q = {.....-3,-2,-1,0,1,2,3,.....}
Q = {0,1,2,3,4,5,.....}
Q 2: The set of even prime number.
{2}
{4}
{0}
Q 3: D is a set of all days in a week.
D = {Sunday, Monday, Tuesday,, Wednesday, Thursday, Satruday}
D = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday}
D = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Satruday}
Q 4: B is a set of all months in a year having 30 days.
B = {February, April, June, September, November}
B = {April, June, September, November}
B = {January, April, June, September, November}
Q 5: The set of even natural numbers which are less than 6.
{1,2,3,4,5}
{1,3,5}
{2,4}
Q 6: The set of odd natural numbers which are less than
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