Question

If A= {1, 2, 3, 4, 5, and B = {4.5) then A∆B =

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Answer 1

{1, 2, 3 }

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

WE KNOW THAT

A∆B= (A-B) U (B-A)

NOW FIRST WE HAVE TO FIND

(A-B) AND (B-A)

(A-B) = {1,2,3,4,5} - { 4,5}

(A-B) ={1,2,3}

(B-A) ={4,5} - { 1,2,3,4,5 }

(B-A) ={EMPTY}

(A-B) U ( B-A) = {1,2,3} - { EMPTY }

SO THE ANSWER IS

{1,2,3}