Question

The multiplicative identity element of rational number us​

Answer 1

the multiplicative identity element of rational Number is 1

Answer 2

Answer:

In mathematics, the multiplicative identity of a set of numbers is a number, I, that is in that set, such that if we multiply any other number, a, in that set by I, we get a back out. That is, if I is the multiplicative identity of a set, and a is a number in that set, then I × a = a × I = a.

It's an identity element (such as 1 in the group of rational numbers without 0) that in a given mathematical system leaves unchanged any element by which it is multiplied