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Home > PC > Chapter 7 > Lesson 7.3.2 > Problem 7-115


Challenge: A geometric sequence has a difference of between its first two terms, and a difference of between its fourth and fifth terms. Find the starting value of the sequence and the ratio between terms.

  1. Find and , assuming that the initial value and the common ratio are both positive.

  2. Extra Challenge: Assuming and could be positive or negative, there are FOUR solutions. Can you find them all?