7. The goal of this problem is a proof of the Lagrange form of the remainder in Taylor's theorem (Corollary 8.13(b) in the book) that is analogous to the proof of the mean value theorem. Let I be an open interval, and let f be a function for which f, f', f", ..., f(n+1) exist on I. (a) Prove the following: Lemma (Generalized Rolle's theorem). If a, b = I are distinct and f(a) = f'(a) = f'(a) f(n)(a) = f(b) = 0, then there exists a point c = (a, b) or (b, a) such that f(n+¹)(c) = 0. Hint. Induction. = ... =

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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7.
The goal of this problem is a proof of the Lagrange form
of the remainder in Taylor's theorem (Corollary 8.13(b) in the book)
that is analogous to the proof of the mean value theorem. Let I be
an open interval, and let ƒ be a function for which f, f', f", ..., f(n+1)
exist on I.
(a) Prove the following:
Lemma (Generalized Rolle's theorem). If a,b ≤ I are distinct
and f(a) = f'(a) = f'(a)= ... = f(n)(a) = f(b) = 0, then there exists
a point c = (a, b) or (b, a) such that f(n+1) (c) = 0. Hint. Induction.
Transcribed Image Text:7. The goal of this problem is a proof of the Lagrange form of the remainder in Taylor's theorem (Corollary 8.13(b) in the book) that is analogous to the proof of the mean value theorem. Let I be an open interval, and let ƒ be a function for which f, f', f", ..., f(n+1) exist on I. (a) Prove the following: Lemma (Generalized Rolle's theorem). If a,b ≤ I are distinct and f(a) = f'(a) = f'(a)= ... = f(n)(a) = f(b) = 0, then there exists a point c = (a, b) or (b, a) such that f(n+1) (c) = 0. Hint. Induction.
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