This question will get you to prove that f(x) = x¹ is continuous at x = 1. (a) Assuming 0 0, find a 6> 0 such that |x-1|< d implies |2³ - 1| < £. (Hint: you can assume d < 1, to derive a simpler estimate)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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4. This question will get you to prove that f(x) = x¹ is continuous at x = 1.
(a) Assuming 0<x< 1+6 (with 6 € (0, 1)), establish the estimate
3
|x¹4 - 1| < |x-1(1+6) k
k=0
(b) Given this estimate and an > 0, find a 8 >0 such that |x-1|< 8 implies |2³ − 1| < ɛ.
(Hint: you can assume d < 1, to derive a simpler estimate)
Transcribed Image Text:4. This question will get you to prove that f(x) = x¹ is continuous at x = 1. (a) Assuming 0<x< 1+6 (with 6 € (0, 1)), establish the estimate 3 |x¹4 - 1| < |x-1(1+6) k k=0 (b) Given this estimate and an > 0, find a 8 >0 such that |x-1|< 8 implies |2³ − 1| < ɛ. (Hint: you can assume d < 1, to derive a simpler estimate)
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