$\"\"$

The geometric sequence is $\"\"$ .

The sequence is in the form of $\"\"$ .

Here $\"\"$ .

$\"\"$ .

Hence the number of terms in the sequence are $\"\"$ .

From problem (41): The sum of $\"\"$ terms of the sequence is $\"\"$ .

Let us consider the sequence as $\"\"$ .

Find the value of function at $\"\"$ using graphing utility.

Graph:

Graph the function $\"\"$ :

$\"\"$

Observe the graph:

The value of the function at $\"\"$ is $\"\"$ .

Therefore, the sum of geometric sequence is $\"\"$ .

$\"\"$ .

$\"\"$

$\"\"$ .