Thread: group question

ı have some problems in writenig mathematical language so ı need some help actually ı need the answer but ı want to learn writng my teacher always talking about my writing so please help me,

Let is a group,
if and then

Originally Posted by sah_mat

Let be a group and prove that if and then

there are different ways to solve the problem. here's one way: we have: and: thus:

we also have: which gives us: hence: and thus: hence because but then

will gives us and hence

ı am glad to see your solution i will try to do again by myself,thanks again