Question

Which of the following sets are null sets

(a) {x: |x |< -4, x ?N}

(b) 2 and 3

(c) Set of all prime numbers between 15 and 19

(d) {x: x < 5, x > 6}

Answer 1

Answer:

a, d

Step-by-step explanation:

(a) {x: |x |< -4, x ?N}

= { }

(b) 2 and 3

{2, 3}

(c) Set of all prime numbers between 15 and 19

{17}

(d) {x: x < 5, x > 6}

{ }

A, D are null sets

Answer 2

Answer:

Step-by-step explanation: a and