Reverse Triangle Inequality/Real and Complex Fields/Examples/6 - (-1)

Example of Use of Reverse Triangle Inequality

$7 = \size {6 - \paren {-1} } \ge \size 6 - \size {-1} = 6 - 1 = 5$

Sources

• 1977: K.G. Binmore: Mathematical Analysis: A Straightforward Approach ... (previous) ... (next): $\S 1$: Real Numbers: Example $\S 1.19 \ \text{(ii)}$