SETS: A set is defined to be a collection of well-defined distinct object .Each object is called an elements of the set .sets denoted by capital letter and elements denoted by small letter.
Example : A= {a,e,i,o,u}
Relation and function : Any subset of the product set XY is said to a define relation form X to Y in which no two different ordered pairs have the same first element is called function.
Results
#1. The null set represented by
A set which does not contain any element is called null set,void set , empty set usually denoted by Greek letter ɸ, read as phi
#2. The number of subsets of the set{2,3,5} is
The number of subsets of the set{2,3,5} is
hint( 2)n
(2)*3
2*2*2=8
#3. A={2,3,5,7},B{4,6,8,10} then A∩B can be written as
intersection set is denoted by ‘∪’
condition: is set A and set B of all elements common
this equation no common elements both A and B set
answer is empty
#4. A={ 1,2,3,4,5,6,7,8,9,10} and B={ 2,3,5,7} find A∩B
#5. If P={1,2,3,5,7},Q={1,3,6,10,15}.The cardinal number of P∩Q is
#6. The set { x|0<x<5} represents the set when x may take integral values only
#7. The set of cubes of the natural number is
#8. {1-(-1)̽ } for all integral x is the set
#9. {(x,y)/xϵx,yϵy,y=x} is
#10. which of the following are not a set ?
infinite answer so it is not a set
#11. Write in roster form E=The set of all letters in the KNOWLEDGE
E letter repeated
#12. The function f(x) =2 ͯ is
#13. If set P has 3 elements , Q four and R two then the set P*Q*R contains
#14. Which of following set are finite set
The days of week is finite set
#15. ∩ this sign is represent
This sign denote A∩B
#16. What does ‘∈’ means?
#17. Write in roster from x:x is a natural number and divisor of 6
#18. Write set in roster form A= { x:x is an integer and -3< x<7}
#19. Difference between A-B; A={1,2,3,4,} B={4,5,6}
