Mathematics

Problem

1. Find the first term of the sequence

2, 6, 18, 54, \dots

which exceeds 10 000. 2. Find the first term of the sequence

4, 4\sqrt{3}, 12, 12\sqrt{3}, \dots

which exceeds 4800. 3. Find the first term of the sequence

12, 6, 3, 1.5, \dots

which is less than 0.0001.