Question

3. If A = {1,2,3,4} and B = {x:x e N and 4 Sx<8), then find:
(a) AB
(b) AUB​

Answer 1

The set which consists of the list of the elements (not repeated) of two or more sets is known as union.

So, (AUB) = 1,2,3,4, U ,1 ,5, 7

which gives (AUB)= 1,2,3,4,5,7

The repeated element here is 1 which should be written only once in the set.

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