/sci/ - Science & Math

Anonymous Sat Apr 11 21:28:48 2020 No.11556172 [View]
File: 142 KB, 1015x427, 774A5880-6F23-4DB9-AF5F-FCF826EF38BC.jpg [View same] [iqdb] [saucenao] [google]

>>11533306
I’m having difficulty following some of the proofs in the introduction of Apostol. Should I just give up?

For example, in pic related I don’t understand why we have |b - c|. Didn’t we just define y = c - b? So why is it that when we plug those values in for x and y in the triangle inequality, it becomes |b - c|? Or am I being a brainlet? I guess since we take the absolute value it doesn’t matter? Since |b - c| always equal to |c - b|?

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/sci/ - Science & Math

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