Question

if A=(123)B=(a b c ) then verify the result n(AuB)=n(A)+n(b)-n(Anb)​

Answer 1

Step-by-step explanation:

(A u B)=[1,2,3,a,b,c](as there is no repeated element)

(A n B) =[ 0](as there is no repeated element)

n(A u B)=6

n(A n B)=0

n(A)=3

n(B)=3

now substitute in

n(A u B)=n(A)+n(B)-n(A n B)

6=3+3-0

6=6

verified

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