Double/Triple/Iterated Integrals and Max/Min

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SUMMARY

This discussion focuses on advanced calculus problems involving double and triple integrals, specifically with change of variables and optimization techniques for maximizing and minimizing functions. Key problems include determining the optimal height-to-radius ratio (H/R) for minimizing the surface area of a right-circular cylinder with a fixed volume V, and calculating the integral I = ∫∫_R 21y dx dy over a specified region R defined by the curves y^2 = 4 - 4x and y^2 = 4 + 4x using a Jacobian. These topics are essential for mastering multivariable calculus concepts.

PREREQUISITES
  • Understanding of double and triple integrals in calculus
  • Familiarity with change of variables in integrals
  • Knowledge of optimization techniques in calculus
  • Experience with Jacobians for transforming integrals
NEXT STEPS
  • Explore optimization problems involving geometric shapes in calculus
  • Study the application of Jacobians in multivariable calculus
  • Practice solving double and triple integrals with various coordinate systems
  • Investigate the relationship between surface area and volume in cylindrical shapes
USEFUL FOR

Students preparing for calculus exams, educators teaching multivariable calculus, and anyone interested in applying optimization techniques in mathematical analysis.

SomeGuy
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Hi people, I have a midterm for calculus coming up, so I was wondering if you guys could give me some interesting problems regarding double/triple/iterated integrals with change of variables, and max/min.
 
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1) Find the ratio H/R of height to radius to minimize the total surface area of a right-circular cylinder of fixed volume V.

2) Find the integral [tex]I = \iint_R 21y dx dy[/tex] where R is the region above the x-axis and bounded by [tex]y^2 = 4 -4x[/tex] and [tex]y^2 = 4 +4x[/tex]. (I would use a jacobian.)
 

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