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David Friday
เข้าร่วมเมื่อ 11 ม.ค. 2013
I'm Dave Friday, and I teach mathematics for Macomb Community College in Macomb County, MI, USA.
The majority of what you can find on my channel resulted from the Covid 19 pandemic. When remote learning rose, I rose to the challenge of creating targeted content to students of mathematics. My playlists are sorted by section. I have completed trigonometry, Calculus 1-3, and I have some decent examples of Linear Algebra.
As we slowly come out of the pandemic, I have been creating less new content. However, if you are interested in seeing a topic not covered here, I'll be happy to take on the request. Email me at the address below with requests.
I also have a GREAT interest in competition math. If you have some competition problems you'd like to see done, hit me up!
The majority of what you can find on my channel resulted from the Covid 19 pandemic. When remote learning rose, I rose to the challenge of creating targeted content to students of mathematics. My playlists are sorted by section. I have completed trigonometry, Calculus 1-3, and I have some decent examples of Linear Algebra.
As we slowly come out of the pandemic, I have been creating less new content. However, if you are interested in seeing a topic not covered here, I'll be happy to take on the request. Email me at the address below with requests.
I also have a GREAT interest in competition math. If you have some competition problems you'd like to see done, hit me up!
Standard form of the equation of a parabola; vertex at the origin
Standard form of the equation of a parabola; vertex at the origin
มุมมอง: 214
วีดีโอ
Defining a parabola: significant points and distances
มุมมอง 754 หลายเดือนก่อน
Defining a parabola: significant points and distances
Examples of hyperbolas not centered at the origin
มุมมอง 594 หลายเดือนก่อน
Examples of hyperbolas not centered at the origin
Examples of hyperbolas centered at the origin
มุมมอง 604 หลายเดือนก่อน
Examples of hyperbolas centered at the origin
Interpreting standard forms of the hyperbola
มุมมอง 334 หลายเดือนก่อน
EDIT: At 9:02, the ordered pair (-7,-1) should be (-7, 1) (no negative on the 1).
Converting non-standard form to standard forms of a hyperbola
มุมมอง 374 หลายเดือนก่อน
Converting non-standard form to standard forms of a hyperbola
Definition of a hyperbola and side-by-side comparison to the ellipse
มุมมอง 704 หลายเดือนก่อน
Definition of a hyperbola and side-by-side comparison to the ellipse
Graphing a transformed exponential function (and background shenanigans by Wednesday)
มุมมอง 515 หลายเดือนก่อน
Graphing a transformed exponential function (and background shenanigans by Wednesday)
Graphing a transformed exponential growth function
มุมมอง 255 หลายเดือนก่อน
Graphing a transformed exponential growth function
Introduction to graphs of exponential functions and properties of these graphs
มุมมอง 645 หลายเดือนก่อน
Introduction to graphs of exponential functions and properties of these graphs
Determining an exponential function given two points
มุมมอง 93ปีที่แล้ว
Determining an exponential function given two points
Solving for inputs and outputs of an exponential function
มุมมอง 50ปีที่แล้ว
Solving for inputs and outputs of an exponential function
An introduction to solving trigonometric equations with a frequency modulation (horizontal shrink)
มุมมอง 90ปีที่แล้ว
An introduction to solving trigonometric equations with a frequency modulation (horizontal shrink)
An example of solving a trigonometric equation with a frequency modulation (horizontal shrink)
มุมมอง 63ปีที่แล้ว
An example of solving a trigonometric equation with a frequency modulation (horizontal shrink)
Working with an ellipse not in standard form
มุมมอง 180ปีที่แล้ว
Working with an ellipse not in standard form
Examples of finding the equation of an ellipse
มุมมอง 425ปีที่แล้ว
Examples of finding the equation of an ellipse
Examples of interpreting the equation of an ellipse
มุมมอง 141ปีที่แล้ว
Examples of interpreting the equation of an ellipse
What is an ellipse? Definition of key points and distances
มุมมอง 957ปีที่แล้ว
What is an ellipse? Definition of key points and distances
Standard forms of the equation of an ellipse
มุมมอง 139ปีที่แล้ว
Standard forms of the equation of an ellipse
Example of synthetic division: divisor is not a factor
มุมมอง 79ปีที่แล้ว
Example of synthetic division: divisor is not a factor
Example of synthetic division: divisor is a factor
มุมมอง 58ปีที่แล้ว
Example of synthetic division: divisor is a factor
Given the equation of a circle, find its center and radius
มุมมอง 134ปีที่แล้ว
Given the equation of a circle, find its center and radius
Given endpoints for the diameter of a circle, find the equation of the circle
มุมมอง 598ปีที่แล้ว
Given endpoints for the diameter of a circle, find the equation of the circle
Definition of a circle and special circles
มุมมอง 286ปีที่แล้ว
Definition of a circle and special circles
My interest would get sparked if I heard what this means geometrically. I imagine each of the two matrices is pair of vectors: each column is a 2D vector.
Thank you 🙏🏻
Two hours before the exam,I found it useful
Hey buddy thanks for explanation can you solve the last one too? I am having doubt
Based on the video, you know what the answer is supposed to be: it should be (x,y). Are you not getting that?
@@davidfriday7498 NO SIR I AM NOT GEETING (x,y)
@@davidfriday7498 if possible please make a video on ending part as my exams are very near..
Thank you
Thanks ❤❤
thank you David
sssvector
came here from one of your older videos that i watched about composite rational functions. was super shocked to see the video only had a thousand views because the video was just perfectly made and helped me right away. great stuff man! keep it up💪
Bestest video on this topic .thank you so much
The sign for "S"ine is "S"ame and c"O"sine is "O"pposite 🙂
You make everything make so much more sense and it's succinct.
2:49 i was in the living room sounding this out ….
Hopefully, no small children around that just learned a new word from you!
goat
Just what I was looking for, thanks! Thanks for the trick at the end where v_2 and v_3 are free. Does that method work for matrices like this?
When there are two free variables, then yes, this will work well.
Bro thank you so much it is so much help full 1 night before the exams
Solid tutorial thank you! Very simple and very helpful
You made me much clear regarding it.
Confused by play list
cant thank you enough
great tips still useful!
Thank you so much for this. It was so simple but I didn't have any notes for this topic and you explained it in just 5 mins.
I’m sorry but the proof is incomplete. You can’t assume that it converges and then use that to find where it converges. You proved that IF the sequence converges then it converges to 3, not that it actually does converge.
Correct. It is incomplete, as those in the comments from 3 years ago have let me know. Feel free to contribute toward the proof by showing that the sequence is bounded and monotonic.
Thank you 🙏🙏
You titled your video as elementary row operations but never used a row operation, instead used only column operations...
A title can only have 100 characters. Changing "row" to "column" puts me at 101 characters. So... pretend I used a transpose?
Great video, thankyou!
That pimp my ride joke was probably my favorite math joke since I started doing math last year. And you helped me on this problem (I forgot to distribute the 2 to 1 while simplifying) much appreciated!
Yo dawg, I heard you like memes, so I put memes in my videos. In two more years, that meme will be older than most of my college freshmen...
Hi so if I had the vectors [3,1,4] and [-2,1,-1] then what would the span for that be? How would I set it up?
u the goat
2nd column should be .........a32c32
Good catch! You are correct; the notation should be a_32*C_32, not a_23*C_23. Thankfully, despite the incorrect notation, I grabbed the correct entry and minor in the video.
do we have to always force a fraction or I can use product rule if i want to?
The Product Rule is a rule for differentiation; L'Hospital's Rule is a rule for evaluating limits. They are not the same and should not be equated any more than L'Hospital's Rule and the Quotient Rule should be equated. Forcing a fraction is necessary.
@@davidfriday7498 okay THANK YOU.
beautiful! great vid thanks
short but clear and easy-understanding video, thank you.
It's probably just me but I dont how often to do the conjugate thing.
At the very least trying it and see if it works will probably be one of the best ways to learn when it is useful.
Harris Laura Young Shirley Brown Charles
You have a funny cat
She's pretty great
I'm currently studying Laplace transform and I'm finding it challenging to recall trigonometric identities. Thank you for the amazing video. (Here's a tip: if you have access to a calculator, you can check if your identity is correct by assuming an angle and verifying if it's equal or not.)
The Laplace transform is no joke, I wish you nothing but the best in your studies.
Sir i have done this question with different transformation and at the last row in matrix become 0 0 0 l -1 -1 0 Is it correct?
Technically, that cannot be rref because the last row doesn't start with a positive 1. If you had gotten 0, 0, 0, -1, -1, -1, then we would have the same result as soon as you multiply the third row by -1.
Thank you sir, but what if you were given one standard basis and one non-standard basis. How do you transition from B'>B and B>B' when B{(1,0) (0,1)} and B'{(1,1) (2,1)}
You can follow the same procedure as what's in the video. The basis vectors from the "to" basis go on the left, and the basis vectors for the "from" basis go on the right. Rref of the first transition you listed will be super easy since you'll start with rref.
what is going on at 1:25
My cat walked into the room. Even when creating content, she is my priority. <3
Thank you for this, it's absolutely wonderful! May I ask permission to use this mnmeonic in my university's peer tutor classes? I really think it would be of great help for students to help them remember. I would cite your video and channel in the presentation. (If you find this important information, our club offers membership for a small fee, equating to 1 USD in the United States)
You are welcome to spread this mnemonic device around. Advertising for the channel is greatly appreciated, if you'd like to encourage others to check out my material.
This video helped me out a lot. Thanks
man ur good in teaching
brooooo i need that calculatorr
www.bestbuy.com/site/texas-instruments-ti-84-plus-graphing-calculator-blue/6621444.p?skuId=6621444 You can find them for cheaper than this at most department stores and pawn shops, but this is a good start, especially if you want it shipped to you.
I just want to know the significance of these two coordinate and the key difference between them. Why is it useful?
One of the big uses of these is a rotated coordinate system in physics. For example, rather than using basis vectors of (1,0) and (0,1) for a horizontal and vertical coordinate system, you could be dealing with a ramp/inclined plane and want to use "up the ramp" as one of the directions and "orthogonal to that direction" as the other basis vector. Or, you could use "the direction of the ramp" and "the direction of gravity" as your basis vectors. The possibilities are endless.
Ok this is genius, never stumbled upon this method before 🫡 for some reason my brain doesnt like basis change but this seems intuitive enough even for me ✨
Is the -1 at 9:02 supposed to be 1
Yes it is, excellent catch!
Thank you so so so much you made our math life much easier...
12:11
Recently found out some of your videos cause I'm going through linear algebra right now! Simply Amazing, Straight to the point and Brilliant! Glad to see there's still new uploads
Thanks very much! Post-pandemic and back to the grind of day to day teaching, it's difficult to find the motivation to keep creating content. It's comments like this that help boost me. I appreciate you
@@davidfriday7498 its sad your not getting more likes but your lessons are very helpful, nice and straight forward
@@x2emeraldgamers164 I appreciate the sentiment, but I absolutely don't do it for the likes. I just want to help out those who are looking for help.