Question

9. Find number of (a) real numbers
(b) rational numbers
(c) integers in set A = [-5,5) U (20,30) U [40,50].​

Answer 1

a.A={...-1, 0,12...}

finite set

b.R={1/2,2/3......}

finite set

c.n(A)=33

Answer 2

Answer:

(a)real no= infinite

(b)rational numbers = infinite

(c) integers in set A= 30