Question

State the reasons for the following :
(i) {1, 2, 3, …., 10} ≠ {x : x ∈ N and 1 < x < 10}
(ii) {2, 4, 6, 8, 10} ≠ {x : x = 2n+1 and x ∈ N}
(iii) {5, 15, 30, 45} ≠ {x : x is a multiple of 15}(iv) {2, 3, 5, 7, 9} ≠ {x : x is a prime number}

Answer 1

(i) since 1<x<10, 1 and 10 Shud not b included in the set
(ii) according to the given condition,the set Shud be {3,5,7,9}
(iii)5 not element of the given set,since it is not a multiple of 15
(iv)9 isn't a prime number