# How do I use summation notation to write the series 2.2 + 6.6?

##### 1 Answer

Aug 11, 2016

#### Answer:

#### Explanation:

Just two terms is not really enough to build the series with confidence. However, lets build based on an assumption:

Let each term be represented by

Let

and so on.

Let the sum be

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Notice that

Notice that we have

Test:

Factor out the 2.2 giving:

So the notation is