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Learn about and revise how to continue sequences and find the nth term of linear and quadratic sequences with GCSE Bitesize AQA Maths.
- continuing a geometric sequence. Calculate the next three terms for the geometric progression 1, 2, 4, 8, 16, … Take two consecutive terms from the sequence.
- continuing a geometric sequence with negative numbers. Calculate the next three terms for the sequence -2, -10, -50, -250, -1250, … Take two consecutive terms from the sequence.
- continuing a geometric sequence with decimals. Calculate the next three terms for the sequence 100, 10, 1, 0.1, 0.01, … Take two consecutive terms from the sequence.
- continuing a geometric sequence involving fractions. Calculate the next three terms for the sequence. 10, \quad 5, \quad 2\frac{1}{2}, \quad 1 \frac{1}{4}, \quad \frac{5}{8}, ...
Finding the n th Term of a Geometric Sequence. Given a geometric sequence with the first term a 1 and the common ratio r , the n th (or general) term is given by. a n = a 1 ⋅ r n − 1 . Example 1: Find the 6 th term in the geometric sequence 3 , 12 , 48 , ... . a 1 = 3 , r = 12 3 = 4 a 6 = 3 ⋅ 4 6 − 1 = 3 ⋅ 4 5 = 3072. Example 2:
Jan 18, 2024 · The geometric sequence calculator finds the nᵗʰ term and the sum of a geometric sequence (to infinity if possible).
This video explains how to find the formula for the nth term of a given geometric sequence given three terms of the sequence. Example: Given the information about the geometric sequence, determine the formula for the nth term. a 0 = 5, a 1 = 40/9, a 3 = 320/81, …. Show Video Lesson.
Jun 27, 2014 · The formula for the nth term of a geometric sequence is given by An = ar^ (n - 1), where a is the first term, n is the term number and r is the common ratio.
- 2 min
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- Brian McLogan
Master how to use the Geometric Sequence Formula, learn how to generate a geometric sequence, and compute the nth term of the geometric sequence. Calculate the fixed quotient and understand how every term is generated using a common ratio.