The formula for a geometric sequence is

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Geometric Sequences: A Formula for the nth Term.

This video shows how derive the formula to find the 'n-th' term of a geometric sequence by considering an example. The formula is then used to find another term of the sequence.

This video looks at identifying geometric sequences as well as finding the nth term of a geometric sequence. It includes four examples.

How to find any term of a geometric sequence.

This video explains how to find the formula for the nth term of a given geometric sequence given three terms of the sequence.

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