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CALCULUS_NOTES_FINAL _COMPLETE CHAPTER 2024

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Calculus Complete Notes

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  • July 16, 2024
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MATH 1141 CALCULUS NOTES

CHAPTER 1 (TOPICS):
 SETS
 INEQUALITIES
 ABSOLUTE VALUES
 FUNCTIONS
 POLYNOMIALS AND RATIONAL FUNCTIONS
 THE TRIGONOMETRIC FUNCTIONS
 THE ELEMENTARY FUNCTIONS
 DEFINED FUNCTIONS
 CONTINUOUS FUNCTIONS


SETS:
- The set N (natural numbers) given by:

N={0,1, 2, 3, 4 , … }

- The set Z (integers ) given by:

N={… ,−3 ,−2,−1,0, 1,2, 3, 4 , … }

- The set Q ( rationalnumbers ) is the collection of all numbers of the form p/q, where
p and q are integers and p ≠ 0


- If A is a set of numbers and x is within that set, then:

x∈ A

- A subset is when a set exists within another. For example {0,1,2} is a subset of
{0,1,2,3}


ABSOLUTE VALUES:
- Definition of an absolute value:



- Additional rules:




TRIANGLE INEQUALITY

,FUNCTIONS:
- Dom(f): set that contains all the input values i.e. Domain

- Codom(f): set that contains all the output values i.e. Range

- Additional rules for notation of functions:




- Composite functions:




POLYNOMIALS AND RATIONAL FUNCTIONS:
- Common Rule:




TRIGONOMETRIC FUNCTIONS:
- Complementary identities:




- Pythagorean identities:




ELEMENTARY FUNCTIONS:
- Functions that are comprised of a finite amount of varying functions

IMPLICITLY DEFINED FUNCTIONS:
- Those that over certain domains and ranges are varying curves
- E.g., piecewise function

CONTINUOUS FUNCTIONS:

,- Continuous functions are those that exist without splitting or being undefined at some
value in the domain

CHAPTER 2 (TOPICS):
 LIMITS OF FUNCTIONS AT INFINITY
 THE DEFINITION OF nlim
→∞
f (x )
 PROVING LIMITS USING THE LIMIT DEFINITION
 PROOFS OF BASIC LIMIT RESULTS
 LIMITS OF FUNCTIONS AT A POINT


LIMITS OF FUNCTIONS AT INFINITY:
- Rules for limits:




- Pinching Theorem




 Example:

, - Limits of the form √ f ( x )−√ g(x ) :
 These limits involve multiplying the numerator and denominator by the same
equation with the opposite sign in the middle
 For example:




THE DEFINITION OF A FUNCTION nlim →∞
f ( x ):
- The limit involves saying that for every small positive number ϵ , there is a real
number M, such that: the distance between the function f (x) and 0 is smaller than
ϵ , for x>M




- We then replace the limit 0 with L and we say the distance between the function and
its limit is |f ( x )−L|
- This allows for a general limit as such:
“For every positive number ϵ , there is a real number M such that if x> M then
|f ( x )−L|< ϵ ”


PROVING THE LIMIT USING THE LIMIT DEFINITION:
- Using the limit definition, we can now prove limits
- A step by step guide:
 You first find the distance between the function and its limit -> |f ( x )−L|
 This then requires that |f ( x )−L|< ϵ
 This is then rearranged in terms of x, providing the values for x which satisfy
the previous statement
 By showing this domain of x values in terms of ϵ , this means that the M
value is equal to the rearranged term
 Therefore if M = “ …”, then |f ( x )−L|< ϵ , whenever x >M
 This completes the proof

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