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ppt on sets chapter of class 11

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Kendriya Vidyalaya Bairagarh
Matematics Assginment
SubmittedTo:-
Mr.RamKishoreSir(PGTMaths)
Submitted By:-
Akshit Saxena (11th
‘A’)
The theory of sets was
developed by German
mathematician Georg Cantor
(1845-1918). He first
encountered sets while working
on “Problems on Trigonometric
Series” . SETS are being used in
mathematics problem since they
were discovered.
Collection of object of a particular kind,
such as, a pack of cards, a crowed of
people, a cricket team etc. In mathematics
of natural number, prime numbers etc.
A set is a well defined collection of
objects.
 Elements of a set are synonymous
terms.
 Sets are usually denoted by capital
letters.
 Elements of a set are represented by
small letters.
There are two ways to represent sets
 Roster or tabular form.
 Set-builder form.
ROSTER OR TABULAR
FORM
In roster form, all the elements of set are
listed, the elements are being separated
by commas and are enclosed within
braces { }.
e.g. : set of 1,2,3,4,5,6,7,8,9,10.
{1,2,3,4,5,6,7,8,9,10}

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Maths sets ppt

  • 1. Kendriya Vidyalaya Bairagarh Matematics Assginment SubmittedTo:- Mr.RamKishoreSir(PGTMaths) Submitted By:- Akshit Saxena (11th ‘A’)
  • 2. The theory of sets was developed by German mathematician Georg Cantor (1845-1918). He first encountered sets while working on “Problems on Trigonometric Series” . SETS are being used in mathematics problem since they were discovered.
  • 3. Collection of object of a particular kind, such as, a pack of cards, a crowed of people, a cricket team etc. In mathematics of natural number, prime numbers etc.
  • 4. A set is a well defined collection of objects.  Elements of a set are synonymous terms.  Sets are usually denoted by capital letters.  Elements of a set are represented by small letters.
  • 5. There are two ways to represent sets  Roster or tabular form.  Set-builder form.
  • 6. ROSTER OR TABULAR FORM In roster form, all the elements of set are listed, the elements are being separated by commas and are enclosed within braces { }. e.g. : set of 1,2,3,4,5,6,7,8,9,10. {1,2,3,4,5,6,7,8,9,10}
  • 7. SET-BUILDER FORM In set-builder form, all the elements of a set possess a single common property which is not possessed by an element outside the set. e.g. : set of natural numbers k k= {x : x is a natural number}
  • 8. EXAMPLE OF SETS IN MATHS N : the set of all natural numbers Z : the set of all integers Q : the set of all rational numbers R : the set of all real numbers Z+ : the set of positive integers Q+ : the set of positive rational numbers R+ : the set of positive real numbers.
  • 9. TYPES OF SETS  Empty sets.  Finite &Infinite sets.  Equal sets.  Subset.  Power set.  Universal set.
  • 10. THE EMPTY SET A set which doesn't contains any element is called the empty set or null set or void set, denoted by symbol ϕ or { }. e.g. : let R = {x : 1< x < 2, x is a natural number}
  • 11. FINITE & INFINITE SETS A set which is empty or consist of a definite numbers of elements is called finite otherwise, the set is called infinite. e.g. : let k be the set of the days of the week. Then k is finite let R be the set of points on a line. Then R is infinite
  • 12. EQUAL SETS Given two sets K & r are said to be equal if they have exactly the same element and we write K=R. otherwise the sets are said to be unequal and we write K=R. e.g. : let K = {1,2,3,4} & R= {1,2,3,4} then K=R
  • 13. SUBSETS A set R is said to be subset of a set K if every element of R is also an element K. R ⊂ K This mean all the elements of R contained in K.
  • 14. POWER SET The set of all subset of a given set is called power set of that set. The collection of all subsets of a set K is called the power set of denoted by P(K).In P(K) every element is a set. If K= [1,2} P(K) = {ϕ, {1}, {2}, {1,2}}
  • 15. UNIVERSAL SET Universal set is set which contains all object, including itself. e.g. : the set of real number would be the universal set of all other sets of number. NOTE : excluding negative root
  • 16. SUBSETS OF R  The set of natural numbers N= {1,2,3,4,....}  The set of integers Z= {…,-2, -1, 0, 1, 2, 3,…..}  The set of rational numbers Q= {x : x = p/q, p, q ∈ Z and q ≠ 0 NOTE : members of Q also include negative numbers.
  • 17. INTERVALS OF SUBSETS OF R  OPEN INTERVAL The interval denoted as (a, b), a &b are real numbers ; is an open interval, means including all the element between a to b but excluding a &b.
  • 18.  CLOSED INTERVAL The interval denoted as [a, b], a &b are Real numbers ; is an open interval, means including all the element between a to b but including a &b.
  • 19. TYPES OF INTERVALS  (a, b) = {x : a < x < b}  [a, b] = {x : a ≤ x ≤ b}  [a, b) = {x : a ≤ x < b}  (a, b) = {x : a < x ≤ b}
  • 20. VENN DIAGRAM A Venn diagram or set diagram is a diagram that shows all possible logical relations between a finite collection of sets. Venn diagrams were conceived around 1880 by John Venn. They are used to teach elementary set theory, as well as illustrate simple set relationships in probability, logic, statistics linguistics and computer science.
  • 21. Venn consist of rectangles and closed curves usually circles. The universal is represented usually by rectangles and its subsets by circle.
  • 22. ILLUSTRATION 1. in fig U= { 1, 2 , 3, ….., 10 } is the universal set of which A = { 2, 4, 3, ……, 10} is a subset. . 2 . 4 . 8 .6 .10 . 3 . 7 . 1 . 5 . 9
  • 23. ILLUSTRATION 2. In fig U = { 1, 2, 3, …., 10 } is the universal set of which A = { 2, 4, 6, 8, 10 } and B = { 4, 6 } are subsets, and also B ⊂ A. . 2 A B . 8 . 4 . 6 . 10 . 3 . 5 .7 . 1 . 9
  • 24. UNION OF SETS : the union of two sets A and B is the set C which consist of all those element which are either in A or B or in both. PURPLE part is the union A U B (UNION) OPERATIONS ON SETS
  • 25. SOME PROPERTIES OF THE OPERATION OF UNION 1) A U B = B U A ( commutative law ) 2) ( A U B ) U C = A U ( B U C ) ( associative law ) 3) A U ϕ = A ( law of identity element ) 4) A U A = A ( idempotent law ) 5) U U A = A ( law of U )
  • 26. SOME PROPERTIES OF THE OPERATION OF INTERSECTION 1) A ∩ B = B ∩ A ( commutative law ) 2) ( A ∩ B ) ∩ C = A ∩ ( B ∩ C ) ( associative law ) 3) Φ ∩ A = Φ, U ∩ A = A( law of Φ and U ) 4) A ∩ A = A ( idempotent law ) 5) A ∩ ( B U C ) = ( A ∩ B ) U ( A ∩ C ) ( distributive law )
  • 27. COMPLEMENT OF SETS Let U = { 1, 2, 3, } now the set of all those element of U which doesn’t belongs to A will be called as A compliment. U A A’ GREY part shows A complement
  • 28. PROPERTIES OF COMPLEMENTS OF SETS 1) Complement laws :1) A U A’ = U 2) A ∩ A’ = Φ 2) De Morgan’s law : 1) ( A U B )’ = A’ ∩ B’ 2) ( A ∩ B )’ = A’ U B’ 3) Laws of double complementation : ( A’ ) ‘ = A 4) Laws of empty set and universal set : Φ ‘ = U & U’ = Φ