Skip to main content
Ch. 4 - Applications of the Derivative
Briggs - Calculus: Early Transcendentals 3rd Edition
Briggs3rd EditionCalculus: Early TranscendentalsISBN: 9780136847243당신이 사용하는 게 아니라요?교과서 변경
4장, 문제 4.4.755

{Use of Tech} Special curves The following classical curves have been studied by generations of mathematicians. Use analytical methods (including implicit differentiation) and a graphing utility to graph the curves. Include as much detail as possible.


x³ + y³ = 3xy (Folium of Descartes)

검증된 단계별 안내
1
Identify the given equation of the curve: \(x^3 + y^3 = 3xy\). This is known as the Folium of Descartes.
To analyze the curve, we start by using implicit differentiation. Differentiate both sides of the equation with respect to \(x\). Remember that \(y\) is a function of \(x\), so apply the chain rule when differentiating terms involving \(y\).
The differentiation of \(x^3\) with respect to \(x\) is \(3x^2\). For \(y^3\), use the chain rule: \(3y^2 \frac{dy}{dx}\). For the right side, differentiate \(3xy\) to get \(3y + 3x \frac{dy}{dx}\).
Set up the equation from the derivatives: \(3x^2 + 3y^2 \frac{dy}{dx} = 3y + 3x \frac{dy}{dx}\). Solve for \(\frac{dy}{dx}\) to find the slope of the tangent line at any point \((x, y)\) on the curve.
To graph the curve, use a graphing utility. Input the original equation \(x^3 + y^3 = 3xy\) and observe the shape of the curve. Note any points of interest such as intercepts, symmetry, or asymptotic behavior. The Folium of Descartes typically has a loop and an asymptote, which should be visible in the graph.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
11m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Implicit Differentiation

Implicit differentiation is a technique used to differentiate equations where the dependent and independent variables are not isolated on one side. It allows us to find the derivative of y with respect to x when y is defined implicitly by an equation, such as x³ + y³ = 3xy. This method involves differentiating both sides of the equation with respect to x and applying the chain rule to terms involving y.
추천 영상:
가이드 코스
05:14
Finding The Implicit Derivative

Graphing Utility

A graphing utility is a software tool or calculator that allows users to visualize mathematical functions and equations. In the context of the Folium of Descartes, a graphing utility can help plot the curve defined by the equation x³ + y³ = 3xy, providing insights into its shape, intercepts, and behavior. This visualization aids in understanding the properties of the curve and its intersections with axes.
추천 영상:
가이드 코스
06:15
Graphing The Derivative

Classical Curves

Classical curves refer to well-studied mathematical curves that have significant historical and theoretical importance, such as the Folium of Descartes. These curves often arise from polynomial equations and exhibit unique properties, such as symmetry and specific points of interest. Understanding these curves involves exploring their geometric characteristics and applications in various fields of mathematics.
추천 영상:
11:41
Summary of Curve Sketching
관련 실천
교과서 질문

Velocity to position Given the following velocity functions of an object moving along a line, find the position function with the given initial position.


v(t) = 2√t; s(0) = 1

76
views
교과서 질문

Evaluate the following limits. Use l’Hôpital’s Rule when it is convenient and applicable.

lim_x→π/2⁻ (π - 2x) tan x  

164
views
교과서 질문

Shipping crates A square-based, box-shaped shipping crate is designed to have a volume of 16 ft³. The material used to make the base costs twice as much (per square foot) as the material in the sides, and the material used to make the top costs half as much (per square foot) as the material in the sides. What are the dimensions of the crate that minimize the cost of materials?

286
views
교과서 질문

Differentials Consider the following functions and express the relationship between a small change in x and the corresponding change in y in the form dy = f'(x)dx.


f(x) = sin⁻¹ x

220
views
교과서 질문

Snell’s Law Suppose a light source at A is in a medium in which light travels at a speed v₁ and that point B is in a medium in which light travels at a speed v₂ (see figure). Using Fermat’s Principle, which states that light travels along the path that requires the minimum travel time (Exercise 55), show that the path taken between points A and B satisfies (sinΘ₁/v₁ = (sin Θ₂) /v₂ . <IMAGE>

291
views
교과서 질문

Evaluate the following limits. Use l’Hôpital’s Rule when it is convenient and applicable.


lim_x→ 1 (x² + 2x) / (x +3)

271
views