calculus derivatives
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Calculus Chapter 3
Derivatives
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3.1 Informal definition of derivative
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3.1 Informal definition of derivativeA derivative is a formula for the rate at which a
function changes.
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Formal Definition
of the Derivative of a function
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You’ll need to “snow” this
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Formal Definition
of the Derivative of a function f’(x)= lim f(x+h) – f(x)
h->0 h
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Notation for derivative y’
dy/dx df/dx
d/dx (f)
f’(x)D (f)
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Rate of change and slope
Slope of a secant line
See diagram
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The slope of the secant line gives the
change between 2 distinct points on acurve.
i.e. average rate of change
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Rate of change and slope-slope of the tangent line to a curve
see diagram
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The slope of the tangent line gives
the rate of change at that one pointi.e. the instantaneous change.
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compare Slope= y-y
x-x
Slope of secant line
m= f ’(x)
Slope of tangent line
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Time for examples Finding the derivative
using the formal definition
This is music to my ears!
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A function has a derivative at a
point
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A function has a derivative at a
point
iff the function’s right-hand and left-
hand derivatives exist and are equal.
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Theorem
If f (x) has a derivative at x=c,
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Theorem
If f (x) has a derivative at x=c,
then f(x) is continuous at x=c.
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Finding points where horizontal
tangents to a curve occur
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3.3 Differentiation Rules1. Derivative of a constant
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
3. Derivative of a constant multiple
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
3. Derivative of a constant multiple
4. Sum and difference rules
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
3. Derivative of a constant multiple
4. Sum and difference rules
5. Higher order derivatives
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
3. Derivative of a constant multiple
4. Sum and difference rules
5. Higher order derivatives6. Product rule
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
3. Derivative of a constant multiple
4. Sum and difference rules
5. Higher order derivatives6. Product rule
7. Quotient rule
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
3. Derivative of a constant multiple
4. Sum and difference rules
5. Higher order derivatives
6. Product rule
7. Quotient rule
8. Negative integer power rule
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3.3 Differentiation Rules1. Derivative of a constant
2. Power Rule for derivatives
3. Derivative of a constant multiple4. Sum and difference rules
5. Higher order derivatives
6. Product rule7. Quotient rule
8. Negative integer power rule
9. Rational power rule
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3.4 Definition
Average velocity of a “body”
moving along a line
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Defintion
Instantaneous Velocity
is the derivative of the position function
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Def. speed
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Definition
Speed
The absolute value of velocity
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Definition
Acceleration
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acceleration Don’t drop the ball on this
one.
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Definition
Acceleration
The derivative of velocity,
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Definition
Acceleration
The derivative of velocity,
Also ,the second derivative of position
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3.5 Derivatives of trig functionsY= sin x
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3.5 Derivatives of trig functionsY= sin x
Y= cos x
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3.5 Derivatives of trig functionsY= sin x
Y= cos x
Y= tan x
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3.5 Derivatives of trig functionsY= sin x
Y= cos x
Y= tan x
Y= csc x
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3.5 Derivatives of trig functionsY= sin x
Y= cos x
Y= tan x
Y= csc x
Y= sec x
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3.5 Derivatives of trig functionsY= sin x
Y= cos x
Y= tan x
Y= csc x
Y= sec xY= cot x
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TEST 3.1-3.5 Formal def derivative
Rules for derivatives
Notation for derivatives Increasing/decreasing
Eq of tangent line
Position, vel, acc
Graph of fct and der
Anything else mentioned,
assigned or results of these
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Whereas
The slope of the secant line gives the
change between 2 distinct points on acurve.
i.e. average rate of change