Answer:
1. not geometric
2. geometric
3. geometric
4. not geometric
5. geometric
6. not geometric
Step-by-step explanation:
1. The ration between 12 and 6 is 2 but the ratio change when it comes to 36, it becomes 3.
2. The common ratio is 1/2
3. The common ratio is 5
4. This is an Arithmetic Sequence with a common difference of 7
5. The common ratio is 3
6. The ratio between 10 and 5 is 2 but it changes when it comes to -20, it becomes -2.
