A Level Maths
Examples, solutions, videos, activities, and worksheets that are suitable for A Level Maths to help students learn how to answer Geometric Series and Geometric Sequence questions.
Geometric Series / Sequence : Example (1)
Geometric Series / Sequence : Example (2)
Geometric Sequences and Series (1 of 2)
This video explains the difference between arithmetic (common difference -- addition, d) and geometric (common ratio -- multiplication, r) sequences.
Then it shows the relation between geometric sequences and exponential functions (y = abx).
It develops the nth term equation for geometric sequences by showing how the repeated multiplication involved is really just an exponent.
Geometric Sequences and Series (2 of 2)
Find the nth term equation for the geometric sequence or find a specific term given:
1. The first few terms
2. A term and the common ratio
3. Two different terms
The formula for the sum of a geometric series is developed and then used to find the sum of a geometric series, given a series of numbers of summation (sigma) notation.
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