Rumus Barisan Geometri

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rumus barisan geometri

Understanding geometric sequences is essential for mastering various mathematical concepts. Geometric sequences, or progressions, involve a series of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number known as the common ratio. This article delves into the fundamental aspects of geometric sequences, exploring their formulae, properties, and applications.

Definition and Formula

A geometric sequence is defined by its first term and the common ratio. The nth term of a geometric sequence can be calculated using the formula: `a_n = a_1 r^(n-1)`, where `a_n` is the nth term, `a_1` is the first term, `r` is the common ratio, and `n` is the term number. This formula helps determine any term in the sequence based on its position.

Properties of Geometric Sequences

Geometric sequences exhibit unique properties. For instance, the ratio between consecutive terms is constant, which is a hallmark of geometric progressions. Additionally, the sequence can either converge or diverge, depending on the common ratio. When the common ratio is between -1 and 1, the sequence converges, approaching zero as n increases.

Applications and Examples

Geometric sequences have practical applications in various fields such as finance, physics, and computer science. For example, they are used to model exponential growth or decay, such as in compound interest calculations and population studies. Understanding these sequences can provide insights into trends and predictions in real-world scenarios.

In summary, geometric sequences are a critical concept in mathematics with wide-ranging applications. By understanding their definition, properties, and uses, one can better grasp the underlying principles of various phenomena in both academic and practical contexts.

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