Let A be the set {1,2,3,4} which ordered pairs are in the relation R={(a,b) such that a divides b }?

it's solved here but why there's no R= {3,1} or {3,2} ? and some other sets ? 3/2 does not give a 0 , so what's going on here ?

Question

Let A be the set {1,2,3,4} which ordered pairs are in the relation R={(a,b) such that a divides b }?

it's solved here but why there's no R= {3,1} or {3,2} ? and some other sets ? 3/2 does not give a 0 , so what's going on here ?

anonymous · Answer

divides means goes in to with no remainder

amistre64 · Answer

if a|b, then for some integer k,  b = ak

anonymous · Answer

it doesn't mean "you can divide it"

anonymous · Answer

ah , thank you ^^

amistre64 · Answer

i think this is saying you are stuck in "posting" mode ....

anonymous · Answer

Because I can't thank you enough !

amistre64 · Answer

:)  good luck