#### The 5th, 8th and 11th terms of a G.P. are p, q, and s respectively. Show that q² = ps.

**Solution:**

#### If a, b, c are in G.P., then show that a², b², c² are also in G.P.

**Solution:**

**More Solutions:**

- The terms of a G.P. with first term a and common ratio r are squared.
- If a, b, c are in G.P. show that (1/a), (1/b), (1/c) are also in G.P.
- If a, b, c, d are in G.P., show that.
- The number of bacteria in a certain culture doubles every hour.
- Find the sum of 20 terms of the series 2 + 6 + 18 + …
- Find the sum of the first 10 terms of the geometric series.