Mathematics

Problem

5. Which term of the following sequences: (a)

2,2 \sqrt{2}, 4, \ldots

is 128 ? (b)

\sqrt{3}, 3,3 \sqrt{3}, \ldots

is 729 ? (c)

\frac{1}{3}, \frac{1}{9}, \frac{1}{27}, \ldots

\frac{1}{19683}