Question

If A = first 7 multiples of 3 and B = {1, 3, 6, 10, 15, 21} the A ∩ B = ?​

Answer 1

Answer:

If A is the set of first $7$ multiples of $3$ and  B= {${1,3,6,10,15,21}$}, then

A∩B={$3,6,15,21$}

Step-by-step explanation:

The first seven multiples of $3$ are $3,6,9,12,15,18,21$.

Therefore A={$3,6,9,12,15,18,21$} and given B={$1,3,6,10,15,21$}

We know A∩B={$x:x$∈A and $x$∈B}

                       = {$3,6,15,21$}.

Hence the answer.

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