calculus 1.1 limits graphically notessmacmathapcalculus.weebly.com/uploads/1/9/2/5/...1.1 limits...

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1.1 Limits Graphically Name:_________________________ Write your questions and thoughts here! Calculus Notes What is a limit? A limit is the __________ a function ______________ from both the left and the right side of a given ___________. Example 1 ሺെ3ሻ ൌ o x f x 3 lim ሺെ3ሻ ൌ o x f x 3 lim ሺെ3ሻ ൌ o x f x 3 lim ሺെ3ሻ ൌ o x f x 3 lim ሺെ3ሻ ൌ o x f x 3 lim Limit: (geeky math definition for Mr. Kelly) Given a function , the limit of ݔas ݔapproaches is a real number if ݔcan be made arbitrarily close to by taking ݔsufficiently close to (but not equal to ). If the limit exists and is a real number, then the common notation is ܔ ܕሺሻ ൌ . What is a one‐sided limit? A one‐sided limit is the ___________ a function approaches as you approach a given ___________ from either the ______ or ______ side. Example 2 “The limit of as ݔapproaches 3 from the left side is 1.” lim ௫→ଷ ݔሻ ൌ െ1 “The limit of as ݔapproaches 3 from the right side is 2.” lim ௫→ଷ ݔሻൌ2 y x y x y x y x y y

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Page 1: Calculus 1.1 Limits Graphically Notessmacmathapcalculus.weebly.com/uploads/1/9/2/5/...1.1 Limits Graphically Write your questions and thoughts here! Notes Example 3 a. o f x x 2 lim

1.1 Limits Graphically Name:_________________________

Write your questions and

thoughts here!

Calculus

Notes 

 What is a limit?  

A limit is the __________ a function ______________ from both the left and the right side of a given ___________.    Example 1 

   3  

 � �

�oxf

x 3lim  

� � �o

xfx 3lim  

� � �o

xfx 3lim  

3   

� � �o

xfx 3lim  

� � �o

xfx 3lim  

   

Limit:  (geeky math definition for Mr. Kelly) Given a function  , the limit of   as   approaches   is a real number   if   can be made arbitrarily close to   by taking   sufficiently close to   (but not equal to  ). If the limit exists and is a real number, then the common notation is 

→. 

   What is a one‐sided limit?  

A one‐sided limit is the ___________ a function approaches as you approach a given ___________ from either the ______ or ______ side.    Example 2 

“The limit of   as   approaches 3 from the left side is  1.”  lim

→1 

“The limit of   as   approaches 3 from the right side is 2.”  lim

→2 

    

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Page 2: Calculus 1.1 Limits Graphically Notessmacmathapcalculus.weebly.com/uploads/1/9/2/5/...1.1 Limits Graphically Write your questions and thoughts here! Notes Example 3 a. o f x x 2 lim

1.1 Limits Graphically

Write your questions and thoughts here!

NotesExample 3 a. � �

��oxf

x 2lim   b.  � �

��oxf

x 2lim   c.  � �

�oxf

x 2lim

 d.  � �

oxf

x 1lim   e.  � �

oxf

x 0lim   f.  � �

�oxf

x 3lim  

g.  � � �o

xfx 1lim   h.  � �

�oxf

x 3lim  

 

i.  2  

j.  1   

   

 When does a limit not exist?  

1.   2.   3.    Example 4 Sketch a graph of a function   that satisfies all of the following conditions. 

a.    3 1 b.  4)(lim

3

o

xgx

 

c.  )(lim2

xgx ��o

d.     is increasing on  2 3  e.    )(lim

2xg

x ��o

)(lim2

xgx ��o

 

 Example 5 Write T (true) or F (false) under each statement.  Use the graph on the right. 

a. � � 1lim1

��oxf

 

b. � � 2lim2

o

xfx

  c. � � 1lim1

�oxf

x

   d. � � 2lim

1

�oxf

  

e.  � � existnot does lim1

o

xfx

 

f.  � � � �xfxfxx �� oo

00

limlim  

 

g.  � � existnot doeslim2

o

xfx

 

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