What is Geometric Progression?

Geometric progression (also known as geometric sequence) is a sequence of numbers where the ratio of any two adjacent terms is constant. The constant ratio is called the common ratio, r of geometric progression. Each term therefore in geometric progression is found by multiplying the previous one by r.

Examples of GP:

• 3,6,12,24,... is a geometric progression with r=2
• 10,−5,2.5,−1.25,... is a geometric progression with r=−21

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