Question

show that every rational number has a multiplicative inverse​

Answer 1

Answer:

The rational number b/a is called the multiplicative inverse or reciprocal of a/b and is denoted by (a/b)-¹

No other rational number is its own reciprocal

We know that there is no rational number which when multiplied with 0, gives 1. Therefore, rational number 0 has no reciprocal or multiplicative inverse.