If aN = { ax:x in N} , then the set 3N cap 7N | vedclass

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Question

(a) $3N = \{ x \in N:x$ is a multiple of $3\}$

$7N = \{ x \in N:x$ is a multiple of $7\}$

$	herefore 3N \cap 7N$$ = \{ x \in $ is a multiple of

Vedclass · Accepted Answer

$21$

Vedclass · Answer

(a) $3N = \{ x \in N:x$ is a multiple of $3\}$

$7N = \{ x \in N:x$ is a multiple of $7\}$

$	herefore 3N \cap 7N$$ = \{ x \in $ is a multiple of $3$ and $7\}$

$ = \{ x \in N:x$ is a multiple of $3$ and $7\}$

$ = \{ x \in N:x$ is a multiple of $21\}=21N.$

If $aN = \{ ax:x \in N\} ,$ then the set $3N \cap 7N$ is .....$N$

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