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 formula for finding the sum of an arithmetic sequence?

• S = n/2 * (a1 + an)

• S = n * (a1 - an)

• S = n/2 * (a1 - an)

• S = n * (a1 + an)

How many terms are used to find the 25th partial sum in the given sequence?

• 30

• 20

• 15

• 25

What is the value of the first term (a1) given in the sequence?

• 150

• 220

• 100

• 200

What is the value of the last term (a25) in the sequence?

• 220

• 200

• 150

• 100

What is the final result of the 25th partial sum calculation?

• 3200

• 4500

• 4000

• 3500