How to calculate the area under a curve

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SUMMARY

The discussion focuses on calculating the area under the curve defined by the equation x³ + y³ - 3axy = 0, specifically when a = 1, which represents the Folium of Descartes. To accurately determine the area of the loop formed by this curve, it is essential to use definite integrals for both the upper and lower parts of the loop. Simply integrating the equation without separating these parts will not yield the correct area. The participants emphasize the necessity of identifying the correct functions for integration to achieve accurate results.

PREREQUISITES
  • Understanding of definite integrals in calculus
  • Familiarity with the Folium of Descartes curve
  • Knowledge of how to derive functions from implicit equations
  • Ability to analyze increasing and decreasing functions
NEXT STEPS
  • Learn how to derive functions from implicit equations using algebraic manipulation
  • Study the properties of the Folium of Descartes and its applications in calculus
  • Explore techniques for integrating piecewise functions
  • Practice calculating areas under curves using definite integrals with various examples
USEFUL FOR

Students and professionals in mathematics, particularly those studying calculus, as well as educators teaching integral calculus and curve analysis.

JG FRANKO
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I was doing some integral exercises for getting area under the function. I was doing only more simple stuff, like functions that don't go over the same "x area" multiple times, like a quadratic function. My question is how to calculate area of a loop in an equation x^3+y^3-3axy=0 if let's say a is 1.

Thank you for your answers in advance
 
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If I create a function out of this equation, I get
gif&s=37.gif

Would the answer be correct, if I would use a definite integral to integrate this function to get the area of the loop?
gif&s=40.gif
 
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JG FRANKO said:
If I create a function out of this equation, I get
View attachment 207587
Would the answer be correct, if I would use a definite integral to integrate this function to get the area of the loop?
View attachment 207588

The function you have will certainly won't give you the answer if you integrate it alone. You need a function for top part of the loop and one for the bottom part of the loop. On the top part the function is increasing and decreasing on the bottom part.
 
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