Find the number of subgroups of index of the elementary abelian group .
The answer should be but i don't see how to approach this problem.
http://www.mathhelpforum.com/math-he...reply&t=186533 . then i took a special case of this problem which is "prove that number of subgroups of order in is equal to the number of subgroups of index in ." Now i was able to prove that has subgroups of order .
I want to solve the question using only the material covered till pg. 168. Your solution uses Vector spaces which is given on pg. 388 and i have not yet read that..