When given two values of a sequence find the first term

The video tutorial explains how to calculate terms in a sequence by finding the difference between known terms and using a formula to determine the first term. It also presents an alternative method for finding terms without backtracking to the first term, emphasizing the importance of understanding the formula application.

What is the significance of the difference calculated in the context of this problem?

Describe the formula used to find the Ace of one and how it relates to the other terms.