Ris the region bounded by the functions f(x) = 2? +1 and the g(x) = – 2 and the lines x=1 and x=3. Represent the volume when R is rotated around the y-axis. Volume = dx
Optimization
Optimization comes from the same root as "optimal". "Optimal" means the highest. When you do the optimization process, that is when you are "making it best" to maximize everything and to achieve optimal results, a set of parameters is the base for the selection of the best element for a given system.
Integration
Integration means to sum the things. In mathematics, it is the branch of Calculus which is used to find the area under the curve. The operation subtraction is the inverse of addition, division is the inverse of multiplication. In the same way, integration and differentiation are inverse operators. Differential equations give a relation between a function and its derivative.
Application of Integration
In mathematics, the process of integration is used to compute complex area related problems. With the application of integration, solving area related problems, whether they are a curve, or a curve between lines, can be done easily.
Volume
In mathematics, we describe the term volume as a quantity that can express the total space that an object occupies at any point in time. Usually, volumes can only be calculated for 3-dimensional objects. By 3-dimensional or 3D objects, we mean objects that have length, breadth, and height (or depth).
Area
Area refers to the amount of space a figure encloses and the number of square units that cover a shape. It is two-dimensional and is measured in square units.
![**Volume of a Solid of Revolution: Rotating Around the y-axis**
In this problem, we are given a region \( R \) that is bounded by the functions \( f(x) \) and \( g(x) \) and the vertical lines \( x = 1 \) and \( x = 3 \). The goal is to find the volume of the solid that is formed when this region is rotated about the y-axis.
The functions are:
\[ f(x) = x^2 + 1 \]
\[ g(x) = x - 2 \]
And the vertical boundaries are:
\[ x = 1 \]
\[ x = 3 \]
To represent the volume of the solid when \( R \) is rotated about the y-axis, we use the method of disks or washers. The volume \( V \) of the solid can be calculated using the integral formula:
\[ \text{Volume} = \int_{1}^{3} \left[ \text{(Outer radius)}^2 - \text{(Inner radius)}^2 \right] \ dx \]
In this context, the outer radius at any point \( x \) is given by \( f(x) = x^2 + 1 \) and the inner radius is given by \( g(x) = x - 2 \).
Thus, the volume integral setup is:
\[ \text{Volume} = \int_{1}^{3} \left[ (x^2 + 1)^2 - (x - 2)^2 \right] \ dx \]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F77ae9024-98f9-40e2-9992-1c0ab1fe204c%2F3f58c9e7-8265-4123-ba65-c2b5578e079e%2Fa12yr3t_processed.png&w=3840&q=75)
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