Question

find the samallest set A such thatA U {1,2} ={1,2,3,5,9}​

Answer 1

ANSWER :

A = { 3 , 5 , 9 }

THANKS

Answer 2

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}