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WAEC - Mathematics (2005 - No. 30)
P = {3, 9, 11, 13} and Q = {3, 7, 9, 15} are subset of the universal set ξ = {1, 3, 7, 9, 11, 13, 15} find P
I
∩ Q
I
{3, 9}
{5, 7, 9}
{1}
{1, 11}
Uitleg
P
I
= {1, 7, 15} ; Q
I
= {1, 13, 11}
P
I
∩ Q
I
= {1}
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