Question

What must be true in order to find a sum for an infinite geometric series?

Answer 1

The law is

Common ratio or r must lies in between 0 and 1

It means

r is in (0,1)

• r is greater than 0 but less than 1

The formula is

`\boxed{\sf S_(\infty)=(a)/(1-r)}`

Answer 2

0 < r < 1

Explanation:

That every sequence gets multiplied by a number less than 1 but more than 0