Find the sum of the first six terms of the geometric sequence

- Find the sum of the first six terms of the geometric sequence 2 4 8
- Find the sum of the first six terms of the geometric sequence 36 18 9
- Find the sum of the first six terms of the geometric sequence 2 6 18 54
- Find the sum of the first six terms of the geometric sequence 3 6 12
- Find the sum of the first six terms of the geometric sequence 5 15 45