Contour COrsiter the following f(xi4): x² +442 Draw a showing the leuce f(x,4)=K,where K=4,K:9 ¢ k=16 mep (urves correspording to

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Chapter2: Second-order Linear Odes
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**Transcription for Educational Website**

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**Topic: Level Curves and Contour Maps**

**Problem Statement:**

Consider the following function \( f(x, y) = x^2 + 4y^2 \). Draw a contour map showing the level curves corresponding to \( f(x, y) = k \), where \( k = 4 \), \( k = 9 \), and \( k = 16 \).

**Explanation:**

To create a contour map for the function \( f(x, y) = x^2 + 4y^2 \), follow these steps:

1. **Identify the Function:**
   - The function given is a quadratic form, which suggests that its level curves will be ellipses centered at the origin.

2. **Level Curves:**
   - For \( k = 4 \), the level curve is described by the equation \( x^2 + 4y^2 = 4 \).
   - For \( k = 9 \), the equation becomes \( x^2 + 4y^2 = 9 \).
   - For \( k = 16 \), the level curve is \( x^2 + 4y^2 = 16 \).

3. **Draw the Contour Map:**
   - Each equation represents an ellipse on the coordinate plane.
   - The contour map will illustrate these ellipses corresponding to each value of \( k \).
   - The axes of the ellipses come from solving for \( x \) and \( y \) in terms of \( k \). Specifically, solve for \( y = \pm \sqrt{\frac{k - x^2}{4}} \) and \( x = \pm \sqrt{k} \) to find the bounds for plotting.

By plotting these ellipses, the contour map will visually represent how \( k \) influences the layout and size of level curves for the function \( f(x, y) \).

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Transcribed Image Text:**Transcription for Educational Website** --- **Topic: Level Curves and Contour Maps** **Problem Statement:** Consider the following function \( f(x, y) = x^2 + 4y^2 \). Draw a contour map showing the level curves corresponding to \( f(x, y) = k \), where \( k = 4 \), \( k = 9 \), and \( k = 16 \). **Explanation:** To create a contour map for the function \( f(x, y) = x^2 + 4y^2 \), follow these steps: 1. **Identify the Function:** - The function given is a quadratic form, which suggests that its level curves will be ellipses centered at the origin. 2. **Level Curves:** - For \( k = 4 \), the level curve is described by the equation \( x^2 + 4y^2 = 4 \). - For \( k = 9 \), the equation becomes \( x^2 + 4y^2 = 9 \). - For \( k = 16 \), the level curve is \( x^2 + 4y^2 = 16 \). 3. **Draw the Contour Map:** - Each equation represents an ellipse on the coordinate plane. - The contour map will illustrate these ellipses corresponding to each value of \( k \). - The axes of the ellipses come from solving for \( x \) and \( y \) in terms of \( k \). Specifically, solve for \( y = \pm \sqrt{\frac{k - x^2}{4}} \) and \( x = \pm \sqrt{k} \) to find the bounds for plotting. By plotting these ellipses, the contour map will visually represent how \( k \) influences the layout and size of level curves for the function \( f(x, y) \). ---
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