Question

Can you show an example of subgroups? and how to solve them
I don't understand closure
If a,b, is an element in H then ab element in H (does ab mean multiple)

I don't understand inverse
ab^-1 element in H. (if we have ab would the inverse be a^-1b^-1)

Some example are much need something visual

Answer 1

I tried explain as simple as possible, hope you will love and thumb up.

Have a good day!!!!