Question

For each of the following sets, determine whether 2 is an element of that set.
(a){x∈R|x is an integer greater than 1}
(b){x∈R|x is the square of an integer}
(c){2 ,{2}} (d){{2},{{2}}}
(e){{2},{2 ,{2}}} (f){{{2}}}

Answer 1

a) {2,3,4,5...} - yes

b){1,4,9,16...} - no

c) 2 is an element of the set - yes

d){2} is not 2,{{2}} is not 2 - no

e) {2} is not 2,{2 ,{2}} is not 2 - no

(f){{2}} is not 2 - no