BuyFind

Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071
BuyFind

Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

Solutions

Chapter 1.7, Problem 123E
To determine

Explain that the method is correct or not.

Expert Solution

Answer to Problem 123E

Solution taken as (,3) is wrong.

Explanation of Solution

Calculation:

Consider an inequality is 1<3x

Multiplying both sides by x .to get x<3 .

That is, 1<3x

  x<3x  when x>0 x(,3)&x(0,)x(0,3)

Consider the line graph

  Precalculus: Mathematics for Calculus - 6th Edition, Chapter 1.7, Problem 123E

Hence, 1<3xx<3 is possible only when x>0 .

Hence, the solution taken as (,3) is wrong.

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