Given two terms find the sum of your arithmetic series

The video tutorial explains how to find the sum of a sequence using a specific formula. It focuses on calculating the 25th partial sum of an arithmetic sequence, given the first and last terms. The instructor walks through the process of plugging values into the formula and calculating the result, which is 4000. The tutorial concludes with a brief clarification of the solution.

What is the significance of the number 25 in the context of the problem?

What is the value of S of 25 after performing the calculation?