Question 105232
{a,b,c} U {a,c}={a,b,c}


Union of sets is the set of ALL elements that belong to those sets.

You might think that union is combination.And, that I could write:

{a,b,c} U {a,c}={a,b,c,a,c}


The problem with this is that a, and c are repeated. this is also correct, but it is not the conventional way. A set is commonly written with distinct elements.


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