Chapter 11.3, Problem 4E

### Calculus (MindTap Course List)

8th Edition
James Stewart
ISBN: 9781285740621

Chapter
Section

### Calculus (MindTap Course List)

8th Edition
James Stewart
ISBN: 9781285740621
Textbook Problem

# Use the Integral Test to determine whether the series is convergent or divergent. ∑ n = 1 ∞ n − 0.3

To determine

Whether the series is convergent or divergent

Explanation

1) Concept:

i) Integral test:

Suppose f is a continuous positive, decreasing function on [1, ) and let an=fn. Then, the series n=1an is convergent if and only if the improper integral 1f(x)dx is convergent.

a) 1fxdx  is convergent, then n=1an is convergent

b) 1fxdx  is divergent, then n=1an is divergent

ii) Improper integral of infinite intervals:

If atfxdx exists for every number ta, then

af(x) dx=limtatfxdx

provided this limit exists (as a finite number)

2) Given:

n=1n-0.3

3) Calculation:

According to the concept,

an=fn=n-0.3

fx=x-0

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