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MAT 1236 Calculus III Section 11.1 Sequences Part I http://myhome.spu.edu/lauw

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Continuous Vs Discrete An understand of discrete systems is important for almost all modern technology

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HW WebAssign 11.1 Part I (13 problems, 40* min.) Quiz: 15.6-15.8, 11.1part I

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Chapter 11 This chapter will be covered in the second and final exam. Go over the note before you do your HW. Reading the book is very helpful. For those of you who want to become a math tutor, this is the chapter that you need to fully understand. DO NOT SKIP CLASSES.

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Motivation Q: How to compute sin(0.5)? A: sin(x) can be computed by the formula

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Motivation

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Foundations for Applications Theory of Series Applications in Sciences and Eng. Taylor Series Fourier Series and Transforms Complex Analysis Numerical Analysis

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Caution Most solutions of the problems in this chapter rely on precise arguments. Please pay extra attention to the exact arguments and presentations. ( Especially for those of you who are using your photographic RAM )

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Caution WebAssign HW is very much not sufficient in the sense that… Unlike any previous calculus topics, you actually have to understand the concepts. Most students need multiple exposure before grasping the ideas. You may actually need to read the textbook, for the first time.

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Come talk to me... I am not sure about the correct arguments... I suspect the series converges, but I do not know why? I think WebAssign is wrong... I think my group is all wrong... I have a question about faith...

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Chocolate in my office

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General Goal We want to look at infinite sum of the form Q: Can you name a concept in calculus II that involves convergent / divergent?

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Sequences Before we look at the convergence of the infinite sum (series), let us look at the individual terms

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Definition A sequence is a collection of numbers with an order Notation:

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Example One of the possible associated sequences of the series is

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Example One of the possible associated sequences of the series is

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Another Example (Partial Sum Sequence) Another possible associated sequences of the series is

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Another Example (Partial Sum Sequence) Another possible associated sequences of the series is

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Example (Physics/Chemistry): Balmer Sequence The Balmer sequence plays a key role in spectroscopy. The terms of the sequence are the absorption wavelengths of the hydrogen atom in nanometer.

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Spectroscopy Spectroscopy is the study of the interaction between radiation and matter. Spectroscopy is often used in physical and analytical chemistry for the identification of substances through the spectrum emitted from or absorbed by them.

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Example 0(a)

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Example 0(b)

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Example 0 We want to know : As Use the limit notation, we want to know

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Definition

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Example 0(a)

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Example 0(b)

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Example 0 We want to know : As In these cases,

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Question Q: Name 2 divergent sequences ( with different divergent “characteristics ”.)

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Limit Laws

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Remarks

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Finding limits There are 5 tools that you can use to find limit of sequences

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Tool #1 (Theorem)

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.

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.

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Example 1 (a)

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Expectations

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Standard Formula

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Example 1 (b)

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Remark: (2.5)

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Standard Formula

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Example 2

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Expectations

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Remark The following notation is NOT acceptable in this class

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PPFTNE Questions Q: Can we use the l’ hospital rule on sequences?

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PPFTNE Questions Q: Is the converse of the theorem also true? If Yes, demonstrate why. If No, give an example to illustrate. If then and

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Tool #2 Use the Limit Laws and the formula

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Example 3(a)

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PPFTNE Questions Q1: Can we use tool #1 to solve this problem?

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PPFTNE Questions Q1: Can we use tool #1 to solve this problem? Q2: Should we use tool #1 to solve this problem?

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Example 3(b)

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Theorem

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