Introducing quadratic sequences
I can recognise the features of a quadratic sequence.
Introducing quadratic sequences
I can recognise the features of a quadratic sequence.
Lesson details
Key learning points
- A quadratic sequence does not have a common difference.
- The second differences between terms are equal.
Keywords
N^th term - The n^th term of a sequence is the position of a term in a sequence where n stands for the term number.
Quadratic - A quadratic is an equation, graph, or sequence whereby the highest exponent of the variable is 2 When x is the variable, they have general form ax^2 + bx + c
Common misconception
Since there is no common difference, further terms in the sequence cannot be generated.
Pupils have seen sequences where the first difference is not common and seen examples of other rules. In this lesson, the concept of a second difference is introduced and this can be used to generate the next first difference.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
-3,0, 1, 0, -3, ... -
common second difference -2
2, 4, 8, 14, 22, ... -
common second difference 2
3, 4, 9, 18, 31, ... -
common second difference 4
4, 10, 17, 25, 34, ... -
common second difference 1
10, 8, 9, 13, 20, ... -
common second difference 3
12, 16, 19, 21, 22, ... -
common second difference -1
1, 2, 4, 8, 16, ... -
geometric
2, 3, 5, 8, 12, ... -
quadratic
3, 7, 11, 15, 19, ... -
arithmetic
4, 6, 10, 16, 26, ... -
Fibonacci