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Theorem: Reverse Triangle Inequalities

For any real numbers \(x,y\in\mathbb R\), the following reverse triangle inequalities hold:

1. $|x+y|\ge |x|-|y|,$
2. $|x+y|\ge |x|-|y|,$

Table of Contents

Proofs: 1

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Proofs: 1

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References

Bibliography

1. Forster Otto: "Analysis 1, Differential- und Integralrechnung einer Veränderlichen", Vieweg Studium, 1983