Question

if R is a relation ont he set A= { 1,2,3,4,5,6,7,8,9} given by xRy<=>y=3x, then R=?​

Answer 1

Answer:

           R = { (1, 3),  (2, 6),  (3, 9) }

Step-by-step explanation:

Formally, xRy means that the ordered pair (x, y) is in the set R.

On the other hand, the rule

   xRy ⇔ y=3x

says that xRy when y=3x.

The ordered pairs (x, y) with y=3x (and elements taken from A, of course) are:

• (1, 3),  (2, 6),  (3, 9)

So...

   R = { (1, 3),  (2, 6),  (3, 9) }