A sequence is a list of numbers in a certain order. Each number is called a term. For example, a sequence is: 5, 10, 15, 20. Sequences can be finite and infinite. In an arithmetic sequence, each term after the first one is obtained by adding a constant, called the common difference, to the previous term. If you are given several terms of a sequence, use the formula for the nth term to find an algebraic expression for the nth term. When finding arithmetic means, first use the formula for the nth term to find d. Then add d to the value before the unknown arithmetic means repeatedly to find the missing means.
*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.