Ch 23: ACT Math - Sequences: Help and Review

About This Chapter

The ACT Math - Sequences chapter of this ACT Prep Help and Review course is the simplest way to master sequences. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of sequences.

Who's it for?

Anyone who needs help preparing for the ACT math section will benefit from taking this course. You will be able to grasp the subject matter faster, retain critical knowledge longer and earn better grades. You're in the right place if you:

  • Have fallen behind in understanding arithmetic or geometric sequences.
  • Need an efficient way to learn about sequences.
  • Learn best with engaging auditory and visual tools.
  • Struggle with learning disabilities or learning differences, including autism and ADHD.
  • Experience difficulty understanding your teachers.
  • Missed class time and need to catch up.
  • Can't access extra math resources at school.

How it works:

  • Start at the beginning, or identify the topics that you need help with.
  • Watch and learn from fun videos, reviewing as needed.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Submit questions to one of our instructors for personalized support if you need extra help.
  • Verify you're ready by completing the ACT Math - Sequences chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the ACT Math - Sequences chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any relevant question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

In this chapter, you'll learn the answers to questions including:

  • What are mathematical sequences?
  • How do you identify and classify arithmetic sequences?
  • What are geometric sequences?
  • How do you identify and classify geometric sequences?

9 Lessons in Chapter 23: ACT Math - Sequences: Help and Review
What is a Mathematical Sequence?

1. What is a Mathematical Sequence?

Math is often the most fun when it acts like a puzzle to be solved. The branch of math where this is the most true involves sequences. Get an introduction to the basics and important vocabulary, as well as learn where sequences appear in nature!

How to Find and Classify an Arithmetic Sequence

2. How to Find and Classify an Arithmetic Sequence

Arithmetic sequences are everywhere, and with a few tricks you learn here, you could end up looking like a psychic the next time you go to a movie or a football game!

Arithmetic Sequence: Formula & Definition

3. Arithmetic Sequence: Formula & Definition

After completing this lesson, you will be able to recognize an arithmetic sequence. You will also be able to use the general formula for finding a term in an arithmetic sequence and be able to write a custom formula for a given arithmetic sequence.

Finding and Classifying Geometric Sequences

4. Finding and Classifying Geometric Sequences

Want your YouTube video to get a lot of hits? Besides including a cute baby or an adorable cat, getting your video to have a big common ratio is the key. Learn what I'm talking about here!

Summation Notation and Mathematical Series

5. Summation Notation and Mathematical Series

The capital Greek letter sigma might be most recognizable as a common symbol in a fraternity or sorority, but it's used for some pretty cool math tricks too. In this lesson, learn how to use sigma for things like determining how many seats are in Michigan Stadium.

How to Calculate an Arithmetic Series

6. How to Calculate an Arithmetic Series

In this lesson, you'll learn how to sum up any arithmetic sequence without having to add up each and every term. You'll never guess the circumstances that led to the discovery of this marvelous formula.

Arithmetic Formulas: Definition & Examples

7. Arithmetic Formulas: Definition & Examples

An arithmetic formula is a group of numbers with a common difference. Arithmetic formulas are sometimes called arithmetic series or arithmetic sequences. This lesson will define an arithmetic formula and give some examples.

How to Calculate a Geometric Series

8. How to Calculate a Geometric Series

If you're not satisfied with knowing how many views your YouTube video will get any one day and need to know how many total views you're getting, geometric series are for you! Learn more in this lesson.

Arithmetic and Geometric Series: Practice Problems

9. Arithmetic and Geometric Series: Practice Problems

There are many different types of problems concerning series and sequences - including some that are pretty abstract. From bouncing balls to adding up odd numbers, test your skills here with additional arithmetic and geometric series practice!

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Other Chapters

Other chapters within the ACT Prep: Help and Review course