Question

Set A=(1,2,3) B=(3,4,,5)then A U B=

Answer 1

the answer is 3

a union b means that the common elements from set a and set b

the common element from set a and set b is 3

therefore,

your answer is 3

Answer 2

A ∪ B = { 1 , 2 , 3 , 4 , 5 }

Given :

A = { 1 , 2 , 3 } , B = { 3 , 4 , 5 }

To find :

The set A ∪ B

Concept :

For two given set set A and B , Union of two sets is denoted by A ∪ B and defined as

A ∪ B = { x : x ∈ A ∨ x ∈ B }

Solution :

Step 1 of 2 :

Write down the given sets

Here the given sets are

A = { 1 , 2 , 3 } , B = { 3 , 4 , 5 }

Step 2 of 2 :

Find the set A ∪ B

A ∪ B

= { x : x ∈ A ∨ x ∈ B }

= { 1 , 2 , 3 , 4 , 5 }

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