Last updated at Jan. 11, 2019 by Teachoo

Transcript

Ex 1.2,5 Are the following pair of sets equal? Give reasons. (i) A = {2, 3}; B = {x: x is solution of x2 + 5x+ 6 = 0} A = {2, 3} B = {x: x is a solution of x2 + 5x + 6 = 0} Solving x2 + 5x + 6 = 0, x2 + 2x + 3x + 6 = 0 x(x + 2) + 3(x + 2) = 0 (x + 2)(x + 3) = 0 x = 2 or x = 3 B = { 2, 3} -2 is in set B, but not in set A As every element of A is NOT same as every element of B A B Ex 1.2,5 Are the following pair of sets equal? Give reasons (ii) A = {x: x is a letter in the word FOLLOW}; B = {y: y is a letter in the word WOLF} A = {x: x is a letter in the word FOLLOW} = {F, O, L, W} B = {y: y is a letter in the word WOLF} = {W, O, L, F} Elements of set A = F, O, L, W Elements of set B = F, O, L, W Every element of A is same as every element of B. A = B

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.