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Proof: (related to "Reverse Triangle Inequalities")

By hypothesis, $x,y\in\mathbb R$ are arbitrary real numbers.

Proof of $(1)$

Proof of $(2)$

q.e.d

| | | | created: 2020-02-06 20:20:20 | modified: 2020-02-06 20:20:37 | by: bookofproofs | references: [581]

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Bibliography (further reading)

[581] Forster Otto: “Analysis 1, Differential- und Integralrechnung einer Veränderlichen”, Vieweg Studium, 1983