[DTube] Geometric Sequences: Find the first term and common ratio

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In this video, we use the general equation for terms of a geometric sequence:

t_n = ar^n-1

to find the first term a, the common ratio r and the nth term of a geometric sequence for a known values of the third term (t₃ = 100) and 5th term (t₄ = 400).

Sequences & Series

1. Geometric Sequences: Find the 4th term given the 7th term
2. Geometric Sequences: Find the first term and common ratio

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