- #1
annoymage
- 362
- 0
Homework Statement
is this suppose to be very obvious?
(xa,xb)=x(a,b) , x are constant
i can't see it T_T
nevertheless, i can't even prove it
to prove (xa,xb) l x(a,b)
let e=(a,b), then there exist integer m,n such that
e=ma+nb
xe=max+nbx
since (xa,xb) l ax and (xa,xb) l bx, then (xa,xb) l xe
to prove x(a,b) l (xa,xb)
i'm stuck here, many method i used but all halfway, can someone give me clue, and tell me is that suppose to be obvious? I'm rushing to class now, thanks in advance