This first lesson on Year 13 Pure Chapter 3 (Sequences and Series) begins by revisiting arithmetic series concepts from GCSE in warm-up questions 3 and 4. From there, we use this as a basis to introduce the "A-Level version" of the nth-term formula for an arithmetic series, followed by some exam-type worked examples.
This lesson is meant as preparation for Exercise 3A, page 61 of the Pearson Edexcel Pure Mathematics Year 2/A2 Textbook.
#sequences #series #sequencesandseries
Introduction: 00:00
Solution to Warm-Up Q1: 1:17
Solution to Warm-Up Q2: 8:12
Solution to Warm-Up Q3: 14:56
Solution to Warm-Up Q4: 17:37
ARITHMETIC SEQUENCES
Introduction: 19:49
Worked Example 1: 20:21
Worked Example 2: 24:19
Worked Example 3: 27:20
Suggested exercises: 33:50