Ortegokeanna740go Ortegokeanna740go Math Answered Which of the following sequences is a geometric sequence? Why?1. 5, 20, 80, 320, ...2. 4, 16, 64, 256, ...3. 5, -10, 20, -40,...4. -2, 4, -8, 16, ...5. 1, 0.6, 0.36, 0.216