Answer:
Hello!
I have make it shorter and easy to understand.
Step-by-step explanation:
To show that g ∈ g H, note that the left coset g H is defined as {gh | h ∈ H} . If you choose h to be the identity element e ∈ H, then g can be written as g . e . Since e ∈ H , this means g ∈ g H.
