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 81E
To determine

To solve: the absolute value inequality. Express the solution using interval notation and graph the solution set.

Expert Solution

Answer to Problem 81E

  x(,1][73,) .

Explanation of Solution

Given:

The given inequality is |3x2|5 .

Concept used:

Properties of absolute value inequalities:

    Inequality Equivalent formGraph
    |x|<cc<x<cPrecalculus: Mathematics for Calculus - 6th Edition, Chapter 1.7, Problem 81E , additional homework tip  1
    |x|ccxcPrecalculus: Mathematics for Calculus - 6th Edition, Chapter 1.7, Problem 81E , additional homework tip  2
    |x|>cx<c or c<xPrecalculus: Mathematics for Calculus - 6th Edition, Chapter 1.7, Problem 81E , additional homework tip  3
    |x|cxc or cxPrecalculus: Mathematics for Calculus - 6th Edition, Chapter 1.7, Problem 81E , additional homework tip  4

Calculation:

According to the properties of absolute value inequalities, thegiven inequalityis expressed as

  |3x2|53x25or3x25{add 2fromboththesides}3x7or3x3{divide 3fromboththesides}x73orx1i.ex(,1][73,)

Hence,the solution set is x(,1][73,) .

The solution set of the inequality graphed on the number line.

  Precalculus: Mathematics for Calculus - 6th Edition, Chapter 1.7, Problem 81E , additional homework tip  5

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