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Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805
BuyFind

Single Variable Calculus: Concepts...

4th Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781337687805

Solutions

Chapter 1, Problem 10P
To determine

To find: The sketch for the region in the plane that consists of all the points (x,y) such that |xy|+|x||y|2 .

Expert Solution

Explanation of Solution

Given:

The given condition is |xy|+|x||y|2 .

Calculation:

Consider the given condition is,

  |xy|+|x||y|2

Consider the variable x as,

  |x|={xifx0xifx<0

Consider the variable y as,

  |y|={yify0yify<0

Then, consider the difference,

  |xy|={xyifxy0xyifxy<0

Consider the case when x>0 and y<0 .

  |xy|+|x||y|2xy+x(y)22x2x1

Consider the case when y>0 and x<0 .

  |xy|+|x||y|2(xy)xy22x2x1

Consider the case when y>x , x>0 and y>0 .

  |xy|+|x||y|2(xy)+xy202(true)

Consider the case when y<x , x>0 and y>0 .

  |xy|+|x||y|2(xy)+xy2xy1y1

Consider the case when y<x , x<0 and y<0 .

  |xy|+|x||y|2(xy)x(y)202(true)

Consider the case when y>x , x<0 and y<0 .

  |xy|+|x||y|2(xy)x(y)22x+2y2y1+x

The graph for all the points in the region that consists of all the points x,y is shown in Figure 1

  Single Variable Calculus: Concepts and Contexts, Enhanced Edition, Chapter 1, Problem 10P

Figure 1

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