Chapter 8.4, Problem 1E

To determine

Complete the sentences using appropriate word.

Answer to Problem 1E

The appropriate word is ‘partial sum’.

Explanation of Solution

Given:

The given sentence is that the $\_\_\_\_\_$ is the sum $S_n$ of the first $n$ terms of an infinite series.

Calculation:

The sum $S_n$ of the first $n$ terms of an infinite series is called a partial sum. The partial sum of an infinite geometric series may approach a limiting value.

Hence the appropriate word is ‘partial sum’.