Double Integration of 4-y^2 in Bounded Region

  • Thread starter Renzokuken
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In summary, double integration is a mathematical process used to find the volume of a 3-dimensional shape by integrating a function over two variables, typically x and y, within a bounded region. In this specific case, the function being integrated is 4-y^2. The bounded region is determined by the given constraints of the problem. Double integration has various applications in physics, engineering, and other scientific fields. There are different methods for solving double integration problems, such as the rectangular, polar, and cylindrical methods, depending on the function and bounded region.
  • #1
Renzokuken
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1. ∬(4-y^2 )dxdy
bounded region between y^2=2x and y^2=8-2x


I took the integral 4-y^2 dx and got 4x-xy^2 from 0-4 = 16-4y^2
then I took the integral 16-4y^2 dy from -2-2 = 128/3

It is wrong and I don't know what to do.
 
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  • #2
draw a picture of y^2=2x and y^2=8-2x on a graph and the limits of integration will become more clear

but to do that first solve for y
 

What is meant by "double integration"?

Double integration is a mathematical process used to find the volume of a 3-dimensional shape. It involves integrating a function over two variables, typically x and y, within a bounded region.

What is the function being integrated in this specific case?

The function being integrated in this case is 4-y^2. This means that for every value of x and y within the bounded region, the function 4-y^2 will be evaluated and summed together to find the total volume.

How is the bounded region determined for double integration?

The bounded region for double integration is typically determined by the given constraints of the problem. These constraints can be in the form of equations, geometrical shapes, or other conditions that limit the values of x and y within the region.

What are some common applications of double integration?

Double integration has many applications in physics, engineering, and other scientific fields. It is commonly used to calculate the volume of irregularly shaped objects, determine the density of a 3-dimensional material, and solve problems involving motion, work, and energy.

Is there a specific method for solving double integration problems?

Yes, there are several methods for solving double integration problems, such as the rectangular, polar, and cylindrical methods. The method used depends on the given function and the shape of the bounded region.

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