Harry saved money each month in 2022. In January 2022 he saved £40. In April 2022 he saved £55.
Given the amount he saved each month is modelled by an arithmetic series, find the total amount Harry saved in 2022.
Given instead the amount he saved each month is modelled by a geometric series, find the total amount Harry saved in 2022.
178 exam-style questions on Edexcel A Level Maths Sequences and Series, covering 3.1 Arithmetic Sequences, 3.2 Arithmetic Series, 3.3 Geometric Sequences, 3.4 Geometric Series, 3.5 Sum to Infinity, 3.6 Sigma Notation, 3.7 Recurrence Relations, and 3.8 Modelling with Series. Each one has a worked solution and a mark scheme showing where the marks go.