For the following set definitions list all of the items in t

For the following set definitions, list all of the items in the set:

C = { x | x is a letter in \"Fire Nation\" }

D = { 4x | x N and x < 6 }

Solution

C = {F,i,r,e,N,a,t,o,n}, if we consider the letters are case sensitive.

If they are no case sensitive then, C = {f,i,r,e,a,t,o,n}

D = {0,4,8,12,16,20}, if we consider Natural numbers start from 0.

If we consider that they start from 1 then, D = {4,8,12,16,20}