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Determine whether the sequence converges or diverges. If it converges, find the limit.$ a_n = e^{2n/(n + 2)} $

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converges to $e^{2}$

Calculus 2 / BC

Chapter 11

Infinite Sequences and Series

Section 1

Sequences

Series

Harvey Mudd College

University of Nottingham

Idaho State University

Boston College

Lectures

01:59

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.

02:28

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.

02:38

Determine whether the sequ…

00:55

we need to look at limit as n goes to infinity, have a N. If that's that limit exists and is finite than our sequence converges. Otherwise our sequence diverges. The exponential function is a continuous function, which means that we're allowed to pull the limit up top into the exponents can. Now we divide the top and the bottom by end to get to divided by one class two over end, as in goes to infinity. This two over and is going to go to zero. And we're just going to get eat to the two over one, which is the same thing as you do too. So we do converge. We converged, Tio, he squared.

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