In Invertible functions gof = Ix and fog = Iy here Ix and Iy means Share with your friends Share 1 Rishabh Mittal answered this Dear Student , Refer the following link : https://www.meritnation.com/ask-answer/question/what-is-indentity-element-please-explain-the-concept-and-p/relations-and-functions/9342787 We hope the above link will help you in clearing the doubt . Regards -6 View Full Answer