👤

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​


Sagot :

Answer:2

Step-by-step explanation: