Explain why the functions in 20 and 21 are discontinuous at the given number a. Then, sketch the graph of the function. 20. if æ #1 S(m) = a = 1 if z = 1 21. Cos a if æ<0 f(x) = { 0 if æ = 0 a = 0 1- a² if æ > 0

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
Chapter8: Introduction To Functions
Section8.7: Functions Defined By Equations
Problem 12OE
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Explain why the functions in 20 and 21 are discontinuous at the given number a. Then, sketch
the graph of the function.
20.
if z #1
f(x)
a = 1
if z=1
21.
cos z
if æ<0
f(x) = { 0
if æ = 0
a = 0
1 – x² if # > 0
Transcribed Image Text:Explain why the functions in 20 and 21 are discontinuous at the given number a. Then, sketch the graph of the function. 20. if z #1 f(x) a = 1 if z=1 21. cos z if æ<0 f(x) = { 0 if æ = 0 a = 0 1 – x² if # > 0
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