H2 Maths 2.1 - Sequences & Series (Foundations)

What you will learn

• A sequence is an ordered list; a series is the sum of its terms u_1 to u_n.
• Arithmetic progression: common difference d, nth term a + (n - 1) d, sum S_n = (n/2)(2 a + (n - 1) d) = (n/2)(a + l).
• Geometric progression: common ratio r, nth term a r^(n - 1), sum S_n = a (r^n - 1) / (r - 1) for r not 1.