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Writing and Using Explicit Rules for Geometric Sequences

Writing and Using Explicit Rules for Geometric Sequences 1.4 - Solution

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To describe a geometrical sequence with a formula, we need to determine the first number and the common ratio between each element. The first number, is The ratio, we get by dividing one of the numbers with the previous one. If we choose the first and second element: Let's now substitute these values in the formula for a geometric sequence, which gives us: