Divisible Group2

The additive group of rational numbers has no subgroups of finite index
Solution to Abstract Algebra by Dummit & Foote 3rd edition Chapter 3.2 Exercise 3.2.21 Prove tha...
Q/Z is divisible
Solution to Abstract Algebra by Dummit & Foote 3rd edition Chapter 3.1 Exercise 3.1.15 Prove tha...