Reciprocal, mathematically, means that the product of a number is 1. All complex numbers except 0 have reciprocal, only 0 has no reciprocal.

To find the reciprocal of a number, just divide it by 1 and you can get its reciprocal.

The characteristics of reciprocity:

The positive real number except 1 plus its reciprocal must be greater than 2;

The negative real number except negative 1 plus its reciprocal must be less than negative 2.