- #1
xlalcciax
- 12
- 0
1. Let G be a group containing subgroups H and K such that we can find an element h e H-K an an element k e K - H. Prove that h o k is not a subgroup of H U K. Deduce that H U K is not a subgroup of G.
I have proved that h o k is not in H U K but I don't know how to deduce that H U K is not a subgroup of G.
I have proved that h o k is not in H U K but I don't know how to deduce that H U K is not a subgroup of G.