Epsilon-delta exercise: Solution different from the one given in the exercise

DigitalSplendid

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Nov 14, 2021
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It will help if anyone can confirm if my solution is correct or not. Does not match with the provided answer.
 
Again, I don't understand your post. E.g., what is your boundary for "something" they mention in the book. BTW, the book's answer looks correct to me this time.
 
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