Question

(AUB) ¹=A¹intersection B¹

Answer 1

let X belongs to( AUB)'

<=>X does not belong to AUB
<=>X does not belong to A or X does not belong to B
<=>X belongs to A' and X belongs to B'
<=>X belongs to A' intersection B'
hence
(AUB) '=A'intersection B'
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Answer 2

U={0,1,2,3,4,5}

A={0,1,2}

B={2,4}

find :

(AUB) ¹