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Use the sum of the first 10 terms to approximate …

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Problem 32 Medium Difficulty

Determine whether the series converges or diverges.
$ \displaystyle \sum_{n = 1}^{\infty} \frac {1}{n^{1 + 1/n}} $


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Related Courses

Calculus 2 / BC

Calculus: Early Transcendentals

Chapter 11

Infinite Sequences and Series

Section 4

The Comparison Tests

Related Topics

Sequences

Series

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Top Calculus 2 / BC Educators
Kayleah Tsai

Harvey Mudd College

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University of Michigan - Ann Arbor

Samuel Hannah

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Calculus 2 / BC Courses

Lectures

Video Thumbnail

01:59

Series - Intro

In mathematics, a series is, informally speaking, the sum of the terms of an infinite sequence. The sum of a finite sequence of real numbers is called a finite series. The sum of an infinite sequence of real numbers may or may not have a well-defined sum, and may or may not be equal to the limit of the sequence, if it exists. The study of the sums of infinite sequences is a major area in mathematics known as analysis.

Video Thumbnail

02:28

Sequences - Intro

In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed. Like a set, it contains members (also called elements, or terms). The number of elements (possibly infinite) is called the length of the sequence. Unlike a set, order matters, and exactly the same elements can appear multiple times at different positions in the sequence. Formally, a sequence can be defined as a function whose domain is either the set of the natural numbers (for infinite sequences) or the set of the first "n" natural numbers (for a finite sequence). A sequence can be thought of as a list of elements with a particular order. Sequences are useful in a number of mathematical disciplines for studying functions, spaces, and other mathematical structures using the convergence properties of sequences. In particular, sequences are the basis for series, which are important in differential equations and analysis. Sequences are also of interest in their own right and can be studied as patterns or puzzles, such as in the study of prime numbers.

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Watch More Solved Questions in Chapter 11

Problem 1
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Problem 5
Problem 6
Problem 7
Problem 8
Problem 9
Problem 10
Problem 11
Problem 12
Problem 13
Problem 14
Problem 15
Problem 16
Problem 17
Problem 18
Problem 19
Problem 20
Problem 21
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Problem 23
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Problem 26
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Problem 28
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Problem 30
Problem 31
Problem 32
Problem 33
Problem 34
Problem 35
Problem 36
Problem 37
Problem 38
Problem 39
Problem 40
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Problem 42
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Problem 45
Problem 46

Video Transcript

Let's determine whether is the Siri's convergence or diverges. So here I'LL use limit comparison Test two. Let's call this term over here am I? And then I'll call Being as then gets really, really big this one over ends really small. So this is called being to be one one over into the one power. So we're ignoring the one over and on the A and Salama comparison says we look at the limit is N goes to infinity of an over bian. That's just the limit as N goes to infinity. So dividing by one over end is the same thing is multiplying by N. And then I could cancel out one of these ends. We just have the limit as n goes to infinity of one over and to the one over end, and this limit will be one. And you can kind of show this here using Let's replace and with X. And let's just look at X to the one over X. So here I can rewrite this as e to the natural Log X is one over X. This is just using the fact that e and natural log of any number is just equal to that number because Ian Ellen X are in verses. And then here I can use a lot of property toe. Pull this one over X outside of the log. And then as X goes to infinity, we have that Ellen X goes to infinity. So we have Ellen next that goes to infinity. But then we have excellent denominated these air, both going to infinity. So we should use Low Patel's rule here. So we take the derivative of the top natural lot. That's just one over X, and then we take the derivative of the denominator X. That's just one. So we have e one over infinity that's equal to eat to the zero, which is equal to one now. We could use limit comparison test because the limit is a number that's bigger than zero and less than infinity. This is what's in the condition that we must satisfy. If we want to use limit comparison, let me take a step back. We just showed that this thing goes toe one so and that shows that this denominator those toe one in the limit So we just have one over one equals one. That's the That's where we're using women comparison. So since there's some diverges, we know this one diverges. You could either use the pee test or just a harmonic series. Our Siri's We'LL also diverge by living comparison, and that's our final answer.

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Top Calculus 2 / BC Educators
Kayleah Tsai

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Caleb Elmore

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Kristen Karbon

University of Michigan - Ann Arbor

Samuel Hannah

University of Nottingham

Calculus 2 / BC Courses

Lectures

Video Thumbnail

01:59

Series - Intro

In mathematics, a series is, informally speaking, the sum of the terms of an infinite sequence. The sum of a finite sequence of real numbers is called a finite series. The sum of an infinite sequence of real numbers may or may not have a well-defined sum, and may or may not be equal to the limit of the sequence, if it exists. The study of the sums of infinite sequences is a major area in mathematics known as analysis.

Video Thumbnail

02:28

Sequences - Intro

In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed. Like a set, it contains members (also called elements, or terms). The number of elements (possibly infinite) is called the length of the sequence. Unlike a set, order matters, and exactly the same elements can appear multiple times at different positions in the sequence. Formally, a sequence can be defined as a function whose domain is either the set of the natural numbers (for infinite sequences) or the set of the first "n" natural numbers (for a finite sequence). A sequence can be thought of as a list of elements with a particular order. Sequences are useful in a number of mathematical disciplines for studying functions, spaces, and other mathematical structures using the convergence properties of sequences. In particular, sequences are the basis for series, which are important in differential equations and analysis. Sequences are also of interest in their own right and can be studied as patterns or puzzles, such as in the study of prime numbers.

Join Course
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