Last updated at Sept. 25, 2018 by Teachoo

Transcript

Ex 1.4, 3 - Chapter 1 Class 11 Sets - Teachoo If A and B are two sets such that A ⊂ B, then what is A ∪ B? Introduction(Example) ∪ Union - Combination of two sets ⊂ Subset – A ⊂ B (all elements of set A in set B) A = {1, 2} B = {1,2,3} Every element of A is in B. So, A is a subset of B i.e. A ⊂ B. A ∪ B = {1, 2} ∪ {1, 2, 3} = {1, 2, 3} = B Ex 1.4,3 If A and B are two sets such that A ⊂ B, then what is A ∪ B? ∪ Union - Combination of two sets ⊂ Subset – A ⊂ B (all elements of set A in set B) If A ⊂ B, then All elements of A are in B. So, A ∪ B = B.

Venn Diagram and Union of Set

Chapter 1 Class 11 Sets

Concept wise

- Depiction and Defination
- Depicition of sets - Roster form
- Depicition of sets - Set builder form
- Intervals
- Null Set
- Finite/Infinite
- Equal sets
- Subset
- Power Set
- Universal Set
- Venn Diagram and Union of Set
- Intersection of Sets
- Difference of sets
- Complement of set
- Number of elements in set - 2 sets (Direct)
- Number of elements in set - 2 sets - (Using properties)
- Number of elements in set - 3 sets
- Proof - Using properties of sets
- Proof - where properties of sets cant be applied,using element

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.