Question

write the multiplicative identity for rational number​

Answer 1

Answer:

1 is the multiplicative identity of Q

Step-by-step explanation:

We know according to definition of multiplicative identity of groups

The number "b" in the group (G,#) is called multiplicative identity if

a # b = a   for all    a belongs to G

And

If

G = Q = Set of rational numbers

then see

Since

1 ∈ Q such that

1 × y = y × 1 = y      for all y ∈ Q  and y = p/q where p,q ∈ Z and q≠0

so

1 is the multiplicative identity of Q