consider the set a = {1/2 ; 3/4 ; 5/6 ; 7/ 8; . . . } which one(s) among the following suggestions below describe(s) it correctly. (simply answer by yes or no {no justi cation required).
a. A={x∈R : 'there exists m∈N satisfying x=2m−1/2m​}
b. A={2m−1/2m​​:m∈N}
c. A={x∈R:2m−1/2m​​ and m∈N}
d. A={x∈Q:2m−1/2m​ and m∈N}
e. A={x∈Q : there exists m∈N satisfying x=2m−1/2m​}
f. A={2m−1/2m​​:m∈Z and m≥1}