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

**Examples of GP:**

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

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