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all right so this video were gonna look at sets and were gonna talk about Union intersection and complement alright so lets talk about what each one is if were given a set a and a universal set u the universal set is the set that contains everything okay and the set of all elements of you that do not belong to a is called the complement of set a and the way we write it is with this a prime here okay so so basically if you have a if you have a universal set u and you have a set a and a has some elements in it well every element that is not in this one in a but as in the universal set thats the complement of a and Im gonna do some examples so Ive got about eight examples to work alright so and then we have the intersection so given two sets a and B to set all of all elements that belong to both set sets a and B is called the intersection of the two sets and this is how we write it a intersect B and then this and then the set of all elements belonging to set a or to set B or to bo