Answer:
geometric
Explanation:
To understand how geometric is better than arithmetic.
We use a arithmetic compared to a geometric
Let the difference be 2
Arithmetic:
1, 2, 4, 6, 8, 10, 12...
Let the multiplier be 2
Geometric:
1, 2, 4, 8, 16, 32, 64, 128, 256, 512
as you can see, geometric shows a robust growth at n=6, therefore Geometric is better.