Lesson #23
Rules for Differentiation




Quote of the Day:
"Although I am absolutely without training or knowledge in the exact sciences, I often seem to have more in common with mathematicians than with my fellow artists." -- M.C. Escher

Objectives:
The student will prove the power rule for derivatives.

The student will apply the appropriate derivative formula to solving derivative problems.



1. Collect Homework.

2. Rules for Derivatives:

Rule #1: Definition of the Derivative



Rule #2: The derivative of a constant is zero.

If f(x) = k
Then f'(x) = 0.

Draw a diagram to see this (interpret the derivative as slope).

Rule #3: The Power Rule



Proof:



Rule #4: The Sum Rule



Proof:


Rule #5: The Difference Rule



The proof is similar to the proof of the Sum Rule.

3. Examples:

 

 

4. Song about the Power Rule

5. Higher-Order Derivatives (Second derivatives, ...)
To determine the second derivative, take the derivative of the first derivative.

The notation for the second derivative:



Examples:





6. Assignment: p. 196 (1, 3, 5, 9, 13, 15, 21, 37a,c, 39, 41a,b, 57)

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Send any comments or questions to: David Pleacher