# Simple quadratic and cubic sequences

In this lesson, we will investigate how terms change when a sequence is quadratic. In other words, it is of the form ax² + bx + c. We will also investigate cubic sequences.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What are the first five triangular numbers?

1/3

Q2.What number should replace a in the Fibonacci-style sequence 1, 1, 2, 3, 5, a, … ?

2/3

Q3.What number should this Fibonacci-style sequence begin with? __ , 4, __, 10, 16, …

3/3

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What are the first five triangular numbers?

1/3

Q2.What number should replace a in the Fibonacci-style sequence 1, 1, 2, 3, 5, a, … ?

2/3

Q3.What number should this Fibonacci-style sequence begin with? __ , 4, __, 10, 16, …

3/3

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Simple quadratic and cubic sequences

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What type of numbers are 1, 8, 27, 64 and 125?

1/3

Q2.What are the first 5 terms of the sequence with nth term 2n² + 1?

2/3

Q3.What are the first 5 terms of the sequence with nth term n³ - 2?

3/3

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Simple quadratic and cubic sequences

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What type of numbers are 1, 8, 27, 64 and 125?

1/3

Q2.What are the first 5 terms of the sequence with nth term 2n² + 1?

2/3

Q3.What are the first 5 terms of the sequence with nth term n³ - 2?

3/3

# Lesson summary: Simple quadratic and cubic sequences

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Dance