교과서 질문
Write each complex number in standard form. (2 + 3i)3
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Ch. 1 - Equations and Inequalities
Blitzer8th EditionCollege AlgebraISBN: 9780136970514
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TOC.tableOfContents
- Ch. P - Fundamental Concepts of Algebra311
- Ch. 1 - Equations and Inequalities398
- Ch. 2 - Functions and Graphs407
- Ch. 3 - Polynomial and Rational Functions306
- Ch. 4 - Exponential and Logarithmic Functions247
- Ch. 5 - Systems of Equations and Inequalities173
- Ch. 6 - Matrices and Determinants143
- Ch. 7 - Conic Sections124
- Ch. 8 - Sequences, Induction, and Probability251
2장, 문제 63
In Exercises 59–94, solve each absolute value inequality. |2x - 6| < 8
검증된 단계별 안내1
Recognize that the inequality involves an absolute value expression: \(|2x - 6| < 8\). The absolute value inequality \(|A| < B\) means that the expression inside the absolute value, \(A\), lies between \(-B\) and \(B\).
Rewrite the inequality without the absolute value as a compound inequality: \(-8 < 2x - 6 < 8\).
Solve the compound inequality step-by-step. First, add 6 to all three parts: \(-8 + 6 < 2x - 6 + 6 < 8 + 6\), which simplifies to \(-2 < 2x < 14\).
Next, divide all parts of the inequality by 2 to isolate \(x\): \(\frac{-2}{2} < \frac{2x}{2} < \frac{14}{2}\), which simplifies to \(-1 < x < 7\).
Interpret the solution: \(x\) must be greater than \(-1\) and less than \(7\) to satisfy the original absolute value inequality.
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주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Absolute Value Definition
The absolute value of a number represents its distance from zero on the number line, always as a non-negative value. For any expression |A| < B, where B > 0, it means the expression A lies between -B and B.
추천 영상:
08:07
Vertex Form
Solving Absolute Value Inequalities
To solve inequalities like |A| < B, rewrite them as a compound inequality: -B < A < B. This allows you to solve for the variable by isolating it within these bounds, providing the solution set.
추천 영상:
06:07Linear Inequalities
Linear Inequalities
Linear inequalities involve expressions where variables are to the first power. After removing the absolute value, solving the resulting linear inequalities requires isolating the variable and understanding inequality properties.
추천 영상:
06:07Linear Inequalities
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