Given two terms find the rule of the arithmetic sequence

The video tutorial explains how to find the formula for an arithmetic sequence. It begins by introducing the problem and the need to find the Nth term formula. The teacher then explains the formula and the importance of determining the common difference, D. Through step-by-step calculations, the common difference is found, and the final formula for the sequence is derived. The tutorial emphasizes understanding the arithmetic sequence's properties and solving for unknowns using given values.

Explain the process of solving for D using the values of a sub 1 and a sub 5.

What is the final formula derived for a sub n in the arithmetic sequence?