A relation R in a set A is called ...`if (a,b)varepsilon R` implies that `(b,a)varepsilon R` for all `a,b varepsilon A`

A relation R in a set A is called ___ if (a,b) in R implies that (b,a) in R for all a,b in R

if A relation R in a set A is called ………… if (a _(1), a _(2)) in R implies (a _(2) , a _(1)) in R for all a _(1) , a _(2) in A.

3^(2n)+7 is divisible by 8 for all n varepsilon N

5^(2n)-1 is divisible by 24 for all n varepsilon N

Let R be a relation on the set of natural numbers ,defined as R ={(x,y):x+2y=20, x,y varepsilon N} and x varepsilon {1,2,3,4,5} .Then ,the range of R is :

The relation R, in the set of real number defined as R = {(a,b): a lt b} is:

If the relation R in a set of integers defined as R = {(a, b): (a + b) is divisible by 7}, is an equivalence relation, then the equivalence class containing 0 is:

Let A={2,3,4,5,6} and R be the relation on A defined by {(a,b):ab varepsilon A and a divides b}. Find domain and range of R.