Mathorama: Recent Episodes
Chris Thiel
Not all functions can take any number. The set of numbers that the function can accept is called a domain. Here we review how to analyze a function to find its domain.
Some Algebra of Calculus
Before Calculus you used Algebra to solve for x. Now in Calculus we use Algebra to manipulate an expression to make for easy Calculus!
| | |
How to use a TI-84 to find the volume of a hollow solid (which is ofter referred to "the washer" method since our circular cross-sections will have a hole in them. Others prefer the name "annular disk" or "ring"SFHS students can follow this link: https://www.deltamath.com/app/assignment/15468561
Everyone can download a pdf at mathorama.com
An introduction to finding the Volume of a solid generated by rotating an area around a line. Everyone can download a pdf at mathorama.com
More Definite Integrals and the Area Under a Curve (4.4 p 293 # 62)
With just a little information about the area of some regions, we can use the properties of integrals to figure out 6 different things!
MVT for Integrals, 1st FTC, and 2nd FTC Proofs Section 4.4 is chock full of gold. There is a lot there, so the video lets you take it in.
Here are the Subjects by Time:
0:00 - The MVT for integrals (Average Value Thm) & AVERAGE VALUEs
4:20 - An example with f(x) =6 and a curious observation
6:24 -The First Fundamental Theorem Proof
11:16 - An Example of FTC1
12:51 - "Net Change Theorem" version of FTC1 with a "word problem" example
15:27 -The Second Fundamental Theorem of Calculus with for examples
19:05 - The End
Elliptical Orbit in a Polar Form (10.6 p745 #59) Not only do we answer the question at hand, we derive the polar form of a conic section.If you want to skip ahead:
Minute 5:45 Finding the distance between the surface of Earth and Explorer 18 when the angle is 60 degrees
Minute 12:53 Proof that e = c/a = 2c/2a=(distance between focii/major axis)
A Bounded Area (def Int) with log base 4 (5.5 p359 #81)
This one has u substitution a a conversion from base 4 to bas e, confirming with the TI-84
An Indefinite Integral with Exponents (5.5 p 359 #76)
This includes u-substitution, and an exponential function in base 2
Proving an old Compounded Interest Formula with L'Hôpital's Rule (5.6 p371 #90)We demonstrate the ln technique as well as makeing a product into a ratio so you can use L'Hôpital's Rule.
Implicit Diff with arctan (5.7 p 380 #71)
Here we find a tangent line of a function using implicit differentiation, the product rule, the chain rule, and some careful algebra.
The Derivative of an Inverse Function (5.3 p340 #67)
The derivative of a inverse function is the reciprocal of the derivative of the inverse function. Be mindful of the exchange of values (x,y) to (y,x) with inverse functions
Limiting the Domain of a Absolute Value Function so it would have an inverse (5.3 p340 #57)
Inverse Functions (5.3 p 340 #53)
We have more than just the horizontal line test now, if a function is strictly monotonic, it will have an inverse.