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Let U={x∈N∣x<20} be the universal set. Let A={x∈N∣x is prime less than 20}, B={x∈N∣x is 3n,n∈N,n≤6}, C={x∈N∣x=2n–1,n∈N,n≤10}. Then n[(A∪B)′∪(A∩C)]=

Answer»

Let U={xNx<20} be the universal set. Let A={xNx is prime less than 20},
B={xNx is 3n,nN,n6},
C={xNx=2n1,nN,n10}. Then n[(AB)(AC)]=



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