<    1      2      3      4    >

---

Geometric progression

An important geometric progression is

 

---

Explanation

We start from

Then also applies

That gives

so that

Substitution of r = 1 – a gives

 

---

Example 1

For you get

and that is exactly 2.

 

---

Deutsch   Español   Français   Nederlands   中文   Русский