Question

Find the smallest set y such that y union {1,2}={1,2,3,5,9}

Answer 1

Let A be the smallest set.

A ∪ {1,2} = {1,2,3,5,9}

A = {3,5,9} or {1,2,3,5,9}

As A is smallest set,we take A = {3,5,9} only

Check:-

{3,5,9} ∪ {1,2} = {1,2,3,5,9}

Hope it helps

Answer 2

Answer:

Let A be the smallest set.

A ∪ {1,2} = {1,2,3,5,9}

A = {3,5,9} or {1,2,3,5,9}

As A is smallest set,we take A = {3,5,9} only

Check:-

{3,5,9} ∪ {1,2} = {1,2,3,5,9}

Hope it helps

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