Optimization of a rectangle's area in two parabolas

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    Area Optimization
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Homework Help Overview

The problem involves determining the maximum area of a rectangle formed between two parabolic curves, defined by the equations y1=x² - k and y2=x² + k. The context suggests a calculus optimization problem, potentially extending beyond typical first-year coursework.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the implications of choosing a specific value for k and question whether the rectangle must be oriented parallel to the axes to maximize its area. There is also consideration of whether tilting the rectangle could yield a larger area.

Discussion Status

The discussion is active, with participants exploring different interpretations of the problem setup. Some express skepticism about the necessity of a slanted rectangle, while others suggest it may be worth considering. The conversation reflects a mix of curiosity and uncertainty regarding the problem's requirements.

Contextual Notes

There is mention of the problem being an extension of first-time calculus, indicating that it may involve concepts not typically covered at that level, such as optimization in two variables. Participants are also reflecting on the appropriateness of the problem for their current understanding.

cinematic
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Homework Statement


Determine the maximum area of a rectangle formed in the region formed by the two curves
y1=x2 - k
y2=x2 + k


Homework Equations


The equations are given, I tried using k=1. so y1= x2 - 1, etc.


The Attempt at a Solution


Is it true that the rectangle has to be sideways (i.e. NOT parallel to the axes in order to maximize the area of the rectangle?)
 
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Why take k = 1? Just leave it as k. Is this problem from a typical first year calculus text? The reason I ask is I would be very surprised if it is asking you to consider rectangles not parallel to the axes. I don't know offhand if the maximum would be attained by a slanted rectangle since I have never seen that problem worked, worked it myself, or even asked for that matter.
 
Actually, this is an extension on first-time calculus. Our teacher was suggesting if it was possible that by tilting the rectangle, so to speak, the maximized area would be obtained, or if it was in the question's best interest to assume a rectangle with sides parallel to the x-axis.
 
cinematic said:
Actually, this is an extension on first-time calculus. Our teacher was suggesting if it was possible that by tilting the rectangle, so to speak, the maximized area would be obtained, or if it was in the question's best interest to assume a rectangle with sides parallel to the x-axis.

I didn't know a question had a "best interest" :smile:

The difficulty of having that problem in a first course is that it would be an optimization problem in two variables. If you haven't had that yet, it would presumably be beyond your abilities. Still, it might be an interesting problem given you had the background.
 

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