1. Sequences and Series
Geometric series.

2. Find the sum of the first 5 terms of a geometric sequence 2, 6, 18,…
We can simply add the terms = 242
We can find the general term and use GDC sum(seq
We can also use the formula for the sum of a geometric series.

3. Geometric Series page 3 in formula booklet
Example 1: A geometric sequence has the form
State the common ratio for this sequence,
Calculate the sum of the first 10 terms of this sequence.
to 3 s.f.

4. Example 2: For the geometric sequence 3, 6, 12, …
Example 2: For the geometric sequence 3, 6, 12, …. find how many terms must be added together to obtain a sum of 3069.
Use numerical solve on your GDC
n = 10

5. Exercise Qns 1 c, d, f , 2 b, 3, 4, 5, 6, 7, 11
Exercise Qns 2 d, e, 3 d, e, 4a, c, e, 5, 6, 10, 11, 12, 16