Chapter 3 - sequences and series

Vocab and formulae for Pearson Edexcel year 2 Textbook Pure Mathematics.

nth term for arithmetic sequence.

u = a + (n-1)d

where d is the common difference, a is the first term, and n is the place of the term in the sequence.

nth term for geometric sequence.

u = ar^(n-1)

where r is the common ratio, a is the first term, and n is the place of the term in the sequence.

What is l (L) in the arithmetic series equation?

the last term

What is a sequence?

A list of terms.

What is a series?

The sum of the terms of a sequence.

What is another word for (arithmetic) sequence?

(arithmetic) progression