Sketch the set of all points (x, y) such that x + y| < e*.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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The task is to sketch the set of all points \((x, y)\) such that \(|x + y| \leq e^x\).

### Explanation:

1. **Understanding the Inequality**:
   - The expression \(|x + y|\) represents the absolute value of \(x + y\).
   - The expression \(e^x\) is an exponential function, where \(e\) is the base of the natural logarithm, approximately equal to 2.71828.

2. **Graphical Interpretation**:
   - The inequality means that the absolute value of the sum of \(x\) and \(y\) must be less than or equal to the exponential function evaluated at \(x\).
   - When visualizing, this will create a region bounded by the lines \(x + y = e^x\) and \(x + y = -e^x\).

3. **Sketching Steps**:
   - Plot the curves \(x + y = e^x\) and \(x + y = -e^x\).
   - These curves will generally expand outwards as \(x\) increases due to the nature of the exponential function.
   - The solution set is the area between these two curves, including the curves themselves.

This sketch represents the points \((x, y)\) that satisfy the given condition.
Transcribed Image Text:The task is to sketch the set of all points \((x, y)\) such that \(|x + y| \leq e^x\). ### Explanation: 1. **Understanding the Inequality**: - The expression \(|x + y|\) represents the absolute value of \(x + y\). - The expression \(e^x\) is an exponential function, where \(e\) is the base of the natural logarithm, approximately equal to 2.71828. 2. **Graphical Interpretation**: - The inequality means that the absolute value of the sum of \(x\) and \(y\) must be less than or equal to the exponential function evaluated at \(x\). - When visualizing, this will create a region bounded by the lines \(x + y = e^x\) and \(x + y = -e^x\). 3. **Sketching Steps**: - Plot the curves \(x + y = e^x\) and \(x + y = -e^x\). - These curves will generally expand outwards as \(x\) increases due to the nature of the exponential function. - The solution set is the area between these two curves, including the curves themselves. This sketch represents the points \((x, y)\) that satisfy the given condition.
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