Let R be a relation defined by
R={(a, b):ab+2>0}. Verify the following
i) (a, b ) belongs to R and (b, c) belongs to R implies that (a, c) belongs to R
I am not understanding this question:if A={5,7,9,11},B={9,10} let a R b means a<b.a belongs to A ,(a,b) belongs to R,b belongs to b .Then
If A={5,6,9,11},B={9,10} let a R b means a<b.a belongs to A(a,b ) belongs to R, b belongs to B then the domain of the sets is {5,6,9,11}am I correct?
Let f be the subset of Z × Z defined by f= {(ab, a+b) : a, b belongs to Z } . Is f a function from Z to Z ?
