# How do you find sum of geometric series 2+6+18+...+1458?

##### 1 Answer

#### Explanation:

Given that first term

Common ratio

General expression for

To ascertain what is number of the last term, insert in the above equation

Writing

or

Now sum of

Given that first term

Common ratio

General expression for

To ascertain what is number of the last term, insert in the above equation

Writing

or

Now sum of