Question

Write the following sets using listing method and classify into finite or infinite set
. (i) A = {x | x Є N and x is an odd number} (ii) B = {x | x Є N and 3x -1 = 0}


please answer me​

Answer 1

Roster form or List form or Tabular form:

First question:

A={1,3,5,7,9,11,13,15,17,19,21,.}

It is an infinite set.

(ii) Solving the equation in the set:

3x-1=0

3x=0+1[transposition]

3x=1

x=1/3

Roster form or List form or Tabular form:

(ii) B={1/3}

It is a finite set.

Important point:

All positive fractions are natural numbers.