Question

If R is the set of all real numbers, what do the cartesian products R×R and RXRx R represent? ​

Answer 1

We have R×R={(x,y):x,y∈R} which represents the coordinates of all the points in two dimensional space and R×R×R={(x,y,z)x,y,z∈R} which represents the coordinates of all the points in three-dimensional space.