 Hello and welcome to the session. In this session we will discuss the following question and the question says, let A is equal to the set containing the elements 1, 4, 9 and B is equal to the set containing the elements 2, 6, 8. Find A union B. Now before we start solving the question, let us first recall what is union of sets? Union of sets A and B is the set that contains elements of A or elements of B or both. So this is our key idea for this question and using this key idea we will solve the question. Let's start the solution now. We are given that set A is equal to the set containing the elements 1, 4, 9 and set B is equal to the set containing the elements 2, 6, 8. Now A union B which is equal to the set containing the elements 1, 4, 9 union the set containing the elements 2, 6, 8. Now using the key idea we have union of sets A and B is the set that contains elements of A or elements of B or both. So A union B contains elements which are in the set A or in set B or both. Therefore A union B is equal to the set containing the elements 1, 2, 4, 6, 8, 9. This is the answer for the given question. With this we end our session. Hope you enjoyed the session.