Finding area with integration and arbitrary line

In summary, to find the value of c that divides the region bounded by y = x^2 and y = 4 into two subregions of equal area, we can use the symmetry of the problem and only consider the first quadrant. By setting the integrals of \sqrt{y} from 0 to c and from c to 4 equal to each other, we can solve for c and find the dividing line.
  • #1
zeion
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Homework Statement



Sketch the region bounded by y = x^2 and y = 4. This region is divided into two sub regions of equal area by a line y = c. Find c.

Homework Equations





The Attempt at a Solution



I try to integrate from 0 to a point c and make it equate to from integrating c to 4 like this:

[tex]

\int_{0}^{c} [(\sqrt{y})-(-\sqrt{y})]dy = \int_{c}^{4} [(\sqrt{y})-(-\sqrt{y})]dy

[/tex]

But after I simplify the c disappears.. is this wrong?
 
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  • #2
Because of the symmetry of this problem, it suffices to look at the region in the first quadrant only.

[tex]\int_{0}^{c} \sqrt{y}~dy = \int_{c}^{4} \sqrt{y}~dy [/tex]
Try working with this equation - c doesn't disappear.
 

1. What is integration and how is it used to find area?

Integration is a mathematical concept that is used to find the area under a curve. It involves breaking down the curve into infinitesimally small segments, finding the area of each segment, and then adding them together to get the total area.

2. How does finding area with integration work for an arbitrary line?

Finding the area under an arbitrary line involves using the same process as with any other curve. The line is broken down into small segments, and the area of each segment is calculated using integration. The total area is then found by adding up all the individual segment areas.

3. Are there any special techniques for finding area with integration for an arbitrary line?

There are no special techniques for finding area with integration for an arbitrary line. The same basic process of breaking down the line into small segments and using integration to find the area of each segment applies.

4. Can finding area with integration be used for any shape or curve?

Yes, finding area with integration can be used for any shape or curve as long as it can be represented by a mathematical function. This includes straight lines, curves, and even irregular shapes.

5. How can finding area with integration be useful in science?

Finding area with integration is useful in science because it allows us to calculate the area under a curve, which can have many real-world applications. For example, it can be used to find the distance traveled by an object over time, or the volume of a three-dimensional object with a curved surface.

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