Question

What is the sum of the infinite geometric series 3 + 1 + 1/3 + 1/9 + ...?

Answer 1

`9/2`

Explanation:

Since common ratio is 1/3 , less than one. The series would converge and its sum can be found out by using the `a/(1-r)` where a is the first term and r is the common ratio. The sum would be `3/(1-1/3)= 9/2`