Question

Is
Substraction associative in rational numbers explain with an example

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Answer 1

Step-by-step explanation:

Union of Sets

Let A and B be the two sets. ... The union of A and B is the set of all those elements which belong either to A or to B or both A and B. Now we will use the notation A U B (which is read as 'A union B') to denote the union of set A and set B.