10/7 class notes

October 7th, 2009

Definition of Derivative (h form)

def of derivative

Property: Derivative of the power function

deriv property

Differentiation: the process of finding an equation for the derivative of a function

Procedure: Differentiating the Power Function

To differentiate the power function, procedure, you multiply by the old exponent, n, then reduce the exponent by 1 to get he new exponent.

Derivative of a Sum of Two Functions: if  f(x) = g(x) + h(x), where g and h are differentiable functions of x, then f’(x) = g’(x) + h’(x)

in words: the derivative of a sum equals the sum of the derivatives. Differentiation distributes over addition

Derivative of a Constant Times a Function: If f(x) = kg(x), where g is a differentiable function of x, then f’(x) = kg’(x), provided k is a constant

in words: the derivative of a constant times a function equals the constant times the derivative of the function

Derivative of a Constant Function: If f(x) = C, where C stands for a constant, then f’(x) = 0 for all values of x.

in words: constants don’t change so their rate of change is zero.

Derivative of a Sine Function:

deriv of sine function

Homework:

Bonus problem, exploring derivatives of other trig functions (not on test), major test friday-these notes are not on test.

Class Notes 10/15

October 17th, 2008

Forward Difference

Limit makes it the slope of the tangent line => Instantaneous rate of change / derivative

The slope of the secant line => Average rate

Ex.

Class Notes September 12, 2008 – Andrew Totta

September 17th, 2008

Integrals

Trapezoids

Definition = geometric shape a total of four sides, at least two of the sides must be parallel

 

Find The Area of a Trapezoid:

Equation = (Trapezoid Area) http://math.about.com/library/blmeasurement.htm

 

-Use this site as reference to b1, b2, and height: 

http://illuminations.nctm.org/Lessons/AreaForms/Trapezoid3.jpg

 

Why Are Trapezoids Important?:

-One can use trapezoids to determine a fairly accurate definite integral.

(definite integral = space underneath function line or curve that represents the product of x & y)

-Example of how to draw trapezoids within integral here:

http://www.peterstone.name/Maplepgs/images/Trapezoid_rule.gif

-Once the trapezoids have been drawn within the integral their areas are added to find the total.

-The more trapezoids drawn (the smaller the h, or change in x) the more accurate the integral.

 

Alternative Ways To Calculate Integral:

-Rather than adding each individual trapezoid’s area to find the total integral, this equation can be used: (1/2) x (h^2) x (b1 + 2b2 + 3b3 + 4b4….) = total integral area

-This web site demonstrates b1, b2, b3, b4, and b5 but represents these sides as y1, y2, y3, y4, and y5:http://www.intmath.com/Integration/Tr1.gif

 

Finding Integral Using a Calculator

            -Enter the function into the first Y= equation bar.

            -Enter L as the lowest side of the first trapezoid, or b1.

            -Enter U as the highest side of last trapezoid.

            -Enter N as the number of trapezoids within the integral.

            -Press Enter a final time for the calculator to give you the total integral.

Equation

September 12th, 2007

this is a fact

lolerzzz.jpg

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