"geometric progression." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/geometric-progression>.
geometric progression. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/geometric-progression
A sequence of numbers in which each number is multiplied by the same factor to obtain the next number in the sequence. In a geometric progression, the ratio of any two adjacent numbers is the same. An example is 5, 25, 125, 625, ... , where each number is multiplied by 5 to obtain the following number, and the ratio of any number to the next number is always 1 to 5.