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Problem 100 Hard Difficulty

If $ y = f(u) $ and $ u = g(x), $ where $ f $ and $ g $ possess third derivatives, find a formula for $ d^3 y/dx^3 $ similar to the one given in Exercise 99.


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Frank Lin

Related Courses

Calculus 1 / AB

Calculus: Early Transcendentals

Chapter 3

Differentiation Rules

Section 4

The Chain Rule

Related Topics

Derivatives

Differentiation

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Heather Zimmers

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Lectures

Video Thumbnail

04:40

Derivatives - Intro

In mathematics, a derivative is a measure of how a function changes as its input changes. Loosely speaking, a derivative can be thought of as how much one quantity is changing in response to changes in some other quantity; for example, the derivative of the position of a moving object with respect to time is the object's velocity. The concept of a derivative developed as a way to measure the steepness of a curve; the concept was ultimately generalized and now "derivative" is often used to refer to the relationship between two variables, independent and dependent, and to various related notions, such as the differential.

Video Thumbnail

44:57

Differentiation Rules - Overview

In mathematics, a differentiation rule is a rule for computing the derivative of a function in one variable. Many differentiation rules can be expressed as a product rule.

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Watch More Solved Questions in Chapter 3

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Problem 10
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Problem 12
Problem 13
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Problem 15
Problem 16
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Problem 24
Problem 25
Problem 26
Problem 27
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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
Problem 41
Problem 42
Problem 43
Problem 44
Problem 45
Problem 46
Problem 47
Problem 48
Problem 49
Problem 50
Problem 51
Problem 52
Problem 53
Problem 54
Problem 55
Problem 56
Problem 57
Problem 58
Problem 59
Problem 60
Problem 61
Problem 62
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Problem 64
Problem 65
Problem 66
Problem 67
Problem 68
Problem 69
Problem 70
Problem 71
Problem 72
Problem 73
Problem 74
Problem 75
Problem 76
Problem 77
Problem 78
Problem 79
Problem 80
Problem 81
Problem 82
Problem 83
Problem 84
Problem 85
Problem 86
Problem 87
Problem 88
Problem 89
Problem 90
Problem 91
Problem 92
Problem 93
Problem 94
Problem 95
Problem 96
Problem 97
Problem 98
Problem 99
Problem 100

Video Transcript

we have this equation for a second derivative from problem number 99. And now we're going to find its derivative to give us an equation for the third derivative. And the way we're going to find its derivative is will use the product rule on this and will use the product rule on this. So let's start with the 1st 1 So we have the first D squared. Why do you squared times the derivative of second? Now, when we take the derivative of this, we have to use the chain rule. So we bring down the to and then we raised the utx to the first and then we multiply by the derivative of Dut X, which would be d squared You d x squared the second derivative. So so far we have in our product rule the first times a derivative of the second. And let's do plus the second dese do you d X squared times the derivative of the first and to take the derivative of D squared. Why do you squared? We're going to have 1/3 derivative t cubed Why d you cubed times a derivative of the inside which would be dut X Okay, so that took us through the first product rule from the first product. Now we move on to the second product rule. So plus, now we're looking at the second product and we have the first do I. D. You times a derivative of the second. So we're taking the derivative of a second derivative That would be 1/3 derivative. So d cubed you d x cubed plus the second D squared you d X squared times the derivative of the first. So we're taking the derivative of Do I Do you? So that's going to be second derivative of why times the derivative of the inside, which is dut X. Now we want to see if there's anything that we can combine or simplify. So noticed that our notice that our first term and our last term both contain the same variable expressions. The second derivative of why, with respect to you the second derivative of you with respect to X and a d u d X and so we have two of them in the first term. We have one of them in the second or the last term, and so we can add those together and we have three of them. So we have three times t squared. Why do you squared times? Do you? D x times d squared you d X squared. Now, if we look closely at our middle two terms, we noticed that they are not the same. And one thing we could do is we have do you d x squared times to utx So we can write that as dut x cubed So we have dut X cubed times the third derivative of why with respect to you And then finally this one term that we were not able to combine with anything Do you? Why do you times that they're derivative of you Whips third derivative of you with respect to X not a formula. I wanted memories I don't know about you

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Related Topics

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Top Calculus 1 / AB Educators
Grace He

Numerade Educator

Heather Zimmers

Oregon State University

Michael Jacobsen

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Joseph Lentino

Boston College

Calculus 1 / AB Courses

Lectures

Video Thumbnail

04:40

Derivatives - Intro

In mathematics, a derivative is a measure of how a function changes as its input changes. Loosely speaking, a derivative can be thought of as how much one quantity is changing in response to changes in some other quantity; for example, the derivative of the position of a moving object with respect to time is the object's velocity. The concept of a derivative developed as a way to measure the steepness of a curve; the concept was ultimately generalized and now "derivative" is often used to refer to the relationship between two variables, independent and dependent, and to various related notions, such as the differential.

Video Thumbnail

44:57

Differentiation Rules - Overview

In mathematics, a differentiation rule is a rule for computing the derivative of a function in one variable. Many differentiation rules can be expressed as a product rule.

Join Course
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