Interactive Demonstration of Relation, domain and range. Evaluating Functions. Vertical Line Test. Inverse of a Function. Function Worksheets (free pdf's with answer keys on all the topics normally covered in Algebra 1 and Algebra 2) One To One Functions. Composition of Functions. Verify domain ownership (HTML or DNS) for my SSL certificate. Note: We do not follow redirects when we validate your domain ownership. When requesting an SSL certificate, we might require you verify that you control the domain for which you're requesting the certificate. To do this, we provide you one of … Oct 13, 2021 · Example. This example demonstrates how to support pre-flight requests, such as those with custom headers or methods other than GET and POST. To support custom headers and additional HTTP verbs, use the allowed-methods and allowed-headers sections as shown in the following example.