Question

what is a closed set of numbers and what operation cant it be used in

Answer 1

put a kap on the bottel so the jeenee kant get out

Answer 2

1. The universal set below is a set of Natural numbers (N).

µ = {x: x, N 3≤ x<14}

1. Give the meaning of the above set builder.                 
2. Enumerate the element of the set above                

        iii. Find n(µ)     

Answer 3

Topic: Basic ideas of Sets

Question: 1. AU ( BUC )

               2. (ANB) NC

               3. (ANB ) U (BNC)