On this question I already have f'(x) and I solved for f''(x) and its zeros. I am looking for where the graph of f(x)= (x+4) / (sqrt((x^2) + 4)) is increasing the fastest. I found the maximum to be (12-sqrt(320)) / 22 or (12-8*sqrt(5)) / 22, approximately -.26, which is incorr

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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On this question I already have f'(x) and I solved for f''(x) and its zeros. I am looking for where the graph of f(x)= (x+4) / (sqrt((x^2) + 4)) is increasing the fastest. I found the maximum to be (12-sqrt(320)) / 22 or (12-8*sqrt(5)) / 22, approximately -.26, which is incorrect according to my online homework. Can you see where I'm going wrong? Thank you. 

fR)=(4り(2'v4) f"ce)= (e? ))-(4
(x44)()[(xかり)+Hサス)(3x)] ())+12x1]
s(x44)-5/2 [12ス-4] f" (2)50 Ny42ス-450
4x44)(x²4=3R
メs
メコ 12tJr2) u)) 320~26 mazj mum of p
2 (N)
22
12-853
マZJ
22
Transcribed Image Text:fR)=(4り(2'v4) f"ce)= (e? ))-(4 (x44)()[(xかり)+Hサス)(3x)] ())+12x1] s(x44)-5/2 [12ス-4] f" (2)50 Ny42ス-450 4x44)(x²4=3R メs メコ 12tJr2) u)) 320~26 mazj mum of p 2 (N) 22 12-853 マZJ 22
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