Final answer:
The textbook Advanced Engineering Mathematics by Dennis Zill, 6th edition, can be accessed for free in web view or PDF on the official publisher's website, and can also be found in major online bookstores and in the university library's digital collection.
Step-by-step explanation:
The textbook Advanced Engineering Mathematics by Dennis Zill, 6th edition, can be accessed through various sources. It is available for free in web view or PDF on the official publisher's website OpenStax.org. It can also be found in major online bookstores and in the university library's digital collection.