How do you find the area of a region using integrals with respect to x or y?

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In summary, the problem involves determining whether to integrate with respect to x or y, drawing a typical approximating rectangle and labeling its height and width, and finding the area of the region. The equations given in the problem (X^2 = y and x-2y = 3) do not intersect and therefore do not determine a region, making it difficult to find the area. It is suggested to check the given equations and possibly draw a graph to better understand the problem.
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Homework Statement


decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width then find the aread of the region

X^2 = y, x-2y = 3

The Attempt at a Solution


i'm not sure how to find if the questions should be repsect to x or y
i tried doing it with respect to X I did it with integral with upper bound being 9 and lower 0 and i plugged in rad x + (x-3)/2 dx and got 45 -4 and the answer is 32/3
HELP
 
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  • #2
Did you draw a graph of the region? The graphs of the functions you gave don't intersect, so they don't determine a region, so you're going to have a tough time finding its area.

Have you posted the right equations?
 

1. What is the formula for finding the area of a region using integrals?

The formula for finding the area of a region using integrals is given by the definite integral of the function that defines the boundary of the region. It is represented as ∫f(x)dx, where f(x) is the function and dx is the infinitesimal element of the x-axis.

2. How is the area of a region related to the concept of integration?

The concept of integration is based on the idea of dividing a region into infinitesimal elements and summing them up to find the total area. In other words, integration is the process of finding the sum of infinitely small elements that make up a region, thus giving us the area of the region.

3. Can integrals be used to find the area of any type of region?

Yes, integrals can be used to find the area of any type of region, as long as the boundary of the region can be represented by a function. This includes regions with curved boundaries, irregular shapes, and even regions in higher dimensions.

4. What are the limits of integration in finding the area of a region?

The limits of integration are the values that define the boundaries of the region along the x-axis. They are typically denoted as a and b in the integral ∫a^b f(x)dx, where a and b are the lower and upper limits, respectively. These limits can be determined by looking at the intersection points of the function with the x-axis.

5. How does the accuracy of the area calculation using integrals change with the number of intervals used?

The accuracy of the area calculation using integrals increases as the number of intervals used increases. This is because using more intervals allows for a better approximation of the shape of the region, leading to a more precise calculation of the area. However, using too many intervals can also lead to computational errors, so it is important to strike a balance between accuracy and efficiency.

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