Question 983594


A' --> complement of subset A --> all elements in {{{U}}} but not in {{{A}}}

if  
U={1,2,3,4,5,6,7,8,9,10} and  
A={1,2,4,6,9,3}

then
A' = {5,7,8,10}

if C={4,5,9,3} and A' = {5,7,8,10}, then C-A' is:

by def: The difference or relative compliment of two sets C and A', denoted by
C-A'  is the set of all elements in C that are not in A'.

 as you can see, none of elements in C are in A',so 
C-A'={4,5,9,3}=C