The proof is amazing, I just don't understand a little tiny step. How does 42/n<1 go

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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The proof is amazing, I just don't understand a little tiny step. How does 42/n<1 go to x<1

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Step 1: The proof that 0 is in all the intersection:

First of all, it must be noted, which is missing in the proof that

m i n space n space w i l l space b e space minus 41 comma space o t h e r w i s e space i f
m i n space n space less than negative 41 comma space vertical line x vertical line space w i l l space b e space l e s s space t h a n space 0 comma space w h i c h space i s space
n o t space p o s s i b l e.

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