GR 9367 # 59
Two subgroups H and K of a group have orders 12 and 30, respectively. Which of the following could Not be the order of the subgroup of G generated by H and K?
answer: A 30
I couldn't figure it out.
Thank you very much in advance!
help!GR 9367 # 59
Re: help!GR 9367 # 59
The subgroup H of order 12 is going to be a subgroup of the subgroup generated by H and K, so 12 must divide the order of this second subgroup. 12 doesn't divide 30.