Question

Write the following sets using listing method and classify into finite or infinite set
(i)A={x/x ∈ N and x is an odd number}
(ii) B={x/x ∈ N and 3x-1=0}
(iii)C= {x/x ∈ N, and x is divisible by 7}​

Answer 1

Answer:

1) A = (1,3,5,7,9....)

It is a infinite set.

2) Let x = Natural number

x = 1 thn, 3(1) - 1 = 3 - 1 = 2

x = 2 thn, 3(2) - 1 = 6 - 1 = 5

B = ( )

It is a finite set.

3) x = (natural number divisible by 7)

if x = 14 thn, 14 is divisible by 7 we get 2.

Thus it is a infinite set.