SOLUTION: indicate the union {a,b,c} U {a,c}

Question 105232This question is from textbook
: indicate the union
{a,b,c} U {a,c} This question is from textbook

Answer by HyperBrain(694) (Show Source): You can put this solution on YOUR website!
{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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HyperBrain!
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