Using the disc method, find the volume of the solid formed by revolving the region bounded by and from to about the x-axis.
Ask by Salazar West. in Portugal
Jan 23,2025
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The volume of the solid is .
Solución
To find the volume of the solid formed by revolving the region bounded by and from to about the -axis using the disk method, follow these steps:
Disk Method Formula
When rotating around the -axis, the volume is given by:
where:
is the function representing the boundary of the region.
is the interval of integration.
Applying to the Given Problem
Identify :
Set up the integral:
Evaluate the integral:
Applying the limits from 0 to 2:
Multiply by to get the volume:
Final Answer
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To find the volume of the solid formed by revolving the region bounded by and from to about the x-axis using the disk method, we start by determining the radius of the disks. The radius at any point is given by the value of the function .
The volume can be calculated using the following integral formula:
In this case, , , and . Thus, we can set up the integral:
This simplifies to:
Now we compute the integral:
Evaluating this from 0 to 2 gives:
Finally, we multiply by :
Thus, the volume of the solid is:
So, the volume of the solid formed by revolving the region bounded by and from to about the x-axis is cubic units.