Suppose you are given the following theorem: Let f, g be two C² functions on R'. Fix x € R' and h > 0, and consider the closed interval [æ, æ + h]. Then for every y E [x, x + h] there exists & E (x, x +h) such that {f(y) – [f (x) + f' (x)(y – x)]}g"(£) = f"(E){g(y) – [g(x)+g'(x)(y – x)]}. Use this theorem to prove the 2"d order Mean Value Theorem. That is prove that if f is C² on R' then f (x + h) = f(x) +hf' (x) + f"(x + 0h) for some 0 E (0, 1). Hint: let g(y) = (y – x)².

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.5: The Kernel And Range Of A Linear Transformation
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Suppose you are given the following theorem: Let f, g be two C² functions
on R'. Fix x € R' and h > 0, and consider the closed interval [æ, æ + h].
Then for every y E [x, x + h] there exists & E (x, x +h) such that
{f(y) – [f (x) + f' (x)(y – x)]}g"(£) = f"(E){g(y) – [g(x)+g'(x)(y – x)]}.
Use this theorem to prove the 2"d order Mean Value Theorem. That is
prove that if f is C² on R' then f (x + h) = f(x) +hf' (x) + f"(x + 0h)
for some 0 E (0, 1). Hint: let g(y) = (y – x)².
Transcribed Image Text:Suppose you are given the following theorem: Let f, g be two C² functions on R'. Fix x € R' and h > 0, and consider the closed interval [æ, æ + h]. Then for every y E [x, x + h] there exists & E (x, x +h) such that {f(y) – [f (x) + f' (x)(y – x)]}g"(£) = f"(E){g(y) – [g(x)+g'(x)(y – x)]}. Use this theorem to prove the 2"d order Mean Value Theorem. That is prove that if f is C² on R' then f (x + h) = f(x) +hf' (x) + f"(x + 0h) for some 0 E (0, 1). Hint: let g(y) = (y – x)².
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