Let A={a,b,{c,d},e}. Which of the following statements are false and why?
(i) {c,d} ⊂ A
(ii) {c, d} A
(iii) {{c,d}} ⊂ A
(iv) a A
(v) a ⊂ A.
(vi) {a,b,e} ⊂ A
(vii) {a,b,e} A
(viii) {a,b,c} ⊂ A
(ix) ϕ A
(x) {ϕ} ⊂ A
(i) False
{c,d} is not a subset of A but it belong to A.
{c,d} ϵ A
(ii) True
{c,d} ϵ A
(iii) True
{c,d} is a subset of A.
(iv) It is true that a belong to A.
(v) False
a is not a subset of A but it belongs to A
(vi) True
(vii) False
{a,b,e} ⊂ A this is the correct form.
(viii) False
{a,b,c} is not a subset of A
(ix) False
ϕ is a subset of A.
ϕ ⊂ A.
(x) False