Mathematics Part-1

Sets (Ex – 1.4) Question 1.Find the union of each of the following pairs of sets:(i) X = {1 ,3, 5}, Y= {1, 2, 3}(ii) A = {a, e, i, o, u}, B = {a, b, c}(iii) A = {x: x is a natural number and multiple of 3}B = {x: x is a natural number less than […]

Sets (Ex – 1.3) Question 1.Make correct statements by filling in the symbols ⊂ or ⊄ in the blank spaces:(i) {2, 3, 4} …{1, 2, 3, 4, 5}(ii) {a, b, c}… {b, c, d}(iii) {x: x is a student of Class XI of your school} … {x: x student of your school}(iv) {x : x is a circle in

Sets (Ex – 1.2) Question 1.Which of the following are examples of the null set?(i) Set of odd natural numbers divisible by 2(ii) Set of even prime numbers(iii) {x: x is a natural number, x ≤ 5 and x > 7}(iv) {y: y is a point common to any two parallel lines} Solution.(i) Set of odd natural numbers divisible by

Sets (Ex – 1.1) Question 1.Which of the following are sets? Justify your answer.(i) The collection of all the months of a year beginning with the letter J.(ii) The collection of ten most talented writers of India.(iii) A team of eleven best-cricket batsmen of the world.(iv) The collection of all boys in your class.(v) The collection of all natural numbers