Use the transformation u = x2 - y? and v = 2xy to evaluate (x2 + y2)dx dy for the R region R bounded by the curves x2 – y2 = 1, x2 – y2 = 9, xy = 2, and xy = 4.

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Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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**Problem Statement:**

Use the transformation \( u = x^2 - y^2 \) and \( v = 2xy \) to evaluate the double integral 

\[
\iint\limits_R (x^2 + y^2) \, dx \, dy
\]

for the region \( R \) bounded by the curves \( x^2 - y^2 = 1 \), \( x^2 - y^2 = 9 \), \( xy = 2 \), and \( xy = 4 \).

**Explanation of Transformation:**

The given transformation involves converting Cartesian coordinates \((x, y)\) to a new coordinate system \((u, v)\) with:
- \( u = x^2 - y^2 \): Represents hyperbolic curves.
- \( v = 2xy \): Represents the product of \(x\) and \(y\) scaled by a factor of 2.

**Boundary Curves:**

- The curves \( x^2 - y^2 = 1 \) and \( x^2 - y^2 = 9 \) are hyperbolas.
- The equations \( xy = 2 \) and \( xy = 4 \) are hyperbolas rotated 45 degrees and represent constant product lines in the \(xy\)-plane.

**Objective:**

Change the domain and variables using the given transformations to solve the double integral over the region \( R \) effectively. The transformation converts the complex region in the \(xy\)-plane into potentially easier regions in the \(uv\)-plane, simplifying the integration process.
Transcribed Image Text:**Problem Statement:** Use the transformation \( u = x^2 - y^2 \) and \( v = 2xy \) to evaluate the double integral \[ \iint\limits_R (x^2 + y^2) \, dx \, dy \] for the region \( R \) bounded by the curves \( x^2 - y^2 = 1 \), \( x^2 - y^2 = 9 \), \( xy = 2 \), and \( xy = 4 \). **Explanation of Transformation:** The given transformation involves converting Cartesian coordinates \((x, y)\) to a new coordinate system \((u, v)\) with: - \( u = x^2 - y^2 \): Represents hyperbolic curves. - \( v = 2xy \): Represents the product of \(x\) and \(y\) scaled by a factor of 2. **Boundary Curves:** - The curves \( x^2 - y^2 = 1 \) and \( x^2 - y^2 = 9 \) are hyperbolas. - The equations \( xy = 2 \) and \( xy = 4 \) are hyperbolas rotated 45 degrees and represent constant product lines in the \(xy\)-plane. **Objective:** Change the domain and variables using the given transformations to solve the double integral over the region \( R \) effectively. The transformation converts the complex region in the \(xy\)-plane into potentially easier regions in the \(uv\)-plane, simplifying the integration process.
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