. For an arbitrary function f, we define f*(=) = lim h→0 f(a+h)-f(z-h) 2h if this limit exists. Let g(a) be a function defined by +) = { cos (²), 0 cos (¹), x 40 x=0 9(x) Show that g* (0) = 0 even though g has no derivative at 0. (You must also explain that why g h no derivative at 0.)

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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4. For an arbitrary function f, we define
f*(z) = lim
h→0
f(z+h)-f(zh)
2h
if this limit exists. Let g(x) be a function defined by
= {cos (²).
0,
g(x) =
cos (), x0
x=0
Show that g* (0) = 0 even though g has no derivative at 0. (You must also explain that why g has
no derivative at 0.)
Transcribed Image Text:4. For an arbitrary function f, we define f*(z) = lim h→0 f(z+h)-f(zh) 2h if this limit exists. Let g(x) be a function defined by = {cos (²). 0, g(x) = cos (), x0 x=0 Show that g* (0) = 0 even though g has no derivative at 0. (You must also explain that why g has no derivative at 0.)
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