1.Set Theory
easy

Find the union of each of the following pairs of sets :

$A = \{ x:x$ is a natural number and multiple of $3\} $

$B = \{ x:x$ is a natural number less than $6\} $

A

$\{ 3\} $

B

$\{ 3\} $

C

$\{ 3\} $

D

$\{ 3\} $

Solution

$A = \{ x:x$ is a natural number and multiple of $3\}  = \{ 3,6,9 \ldots \} $

As $B = \{ x:x$ is a natural number less than $6\}  = \{ 1,2,3,4,5,6\} $

$\therefore A \cap B=\{3\}$

Standard 11
Mathematics

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