Analyze the function f(x) = x+17 4x +15 if x < 4 if x ≥ 4

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter11: Rational And Irrational Numbers
Section: Chapter Questions
Problem 23CLR
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=
Analyze the function f(x) =
1/1/x-
{.
x+17
4x +15
if x < 4
if x ≥ 4
Transcribed Image Text:= Analyze the function f(x) = 1/1/x- {. x+17 4x +15 if x < 4 if x ≥ 4
For continuity, calculate f (4), the left hand limit lim
1
2
x→4-
x + 17 the right hand limit lim √4x + 15
x →4+
f(x) =
=
f(x)-f(4)
x-4
For differentiability, you need to compute the left hand limit of
√4x + 15 and see whether they are the same or not. You can use that both f(x) =
functions and apply our rules for derivatives for these two functions (individually).
with f(x) = 1 x
f(x)-f(4)
x-4
x+17 and ƒ(x) = √4x +15 are differentiable
x+17 and the right hand limit of
with
Transcribed Image Text:For continuity, calculate f (4), the left hand limit lim 1 2 x→4- x + 17 the right hand limit lim √4x + 15 x →4+ f(x) = = f(x)-f(4) x-4 For differentiability, you need to compute the left hand limit of √4x + 15 and see whether they are the same or not. You can use that both f(x) = functions and apply our rules for derivatives for these two functions (individually). with f(x) = 1 x f(x)-f(4) x-4 x+17 and ƒ(x) = √4x +15 are differentiable x+17 and the right hand limit of with
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