Math Problem Statement
Chứng minh bất đẳng thức: ∣a∣+∣b∣≤∣a+b∣+∣a−b∣
Solution
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Math Problem Analysis
Mathematical Concepts
Absolute Value
Inequalities
Algebra
Formulas
|a| + |b| ≤ |a + b| + |a - b|
|x| = √(x²)
Triangle Inequality: |a + b| ≥ |a| - |b|
Theorems
Triangle Inequality
Suitable Grade Level
Grades 10-12