Question

6.
Consider the sets A = {2,3,5,7), B = {1,2,3,4,6,12).
(a) Find A - B and B - A
(b) Write the power set of AnB​

Answer 1

Given : A = {2,3,5,7), B = {1,2,3,4,6,12).

To Find :  

(a)  A - B and B - A

(b) Write the power set of AnB​

Solution:

A = {2,3,5,7), B = {1,2,3,4,6,12).

A - B    means Elements of A which are not in B

=> A - B  = { 5 , 7 }

B - A    means Elements of B  which are not in A

=> A - B  = { 1 , 4 , 6 , 12 }

AnB​   common elements of A and B

=> AnB  = { 2 , 3 }

power set of AnB​ = 2² = 4

= { {} , {2} , {3} , { 2, 3} }

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