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Room 244
เข้าร่วมเมื่อ 6 ธ.ค. 2011
Math Videos, Audiobooks and assorted other videos - Many of the videos on this channel deal with high school mathematics. More recently I have posted videos on other topics, including audiobooks. If my videos help you learn math, great. Furthermore, I hope that my recordings will help some of my subscribers improve their English. Happy studying!
Pythagoras and Fibonacci
An exploration of Pythagorean triples and some surprising connections to Fibonacci numbers.
Here's the document I went through: docs.google.com/document/d/1K1rqQfYrF2RF977F6TabLpdVXf-RnHTFju7vDRElFEk/edit?usp=sharing
The book I drew the material from is:
The Pythagorean Theorem: The Story of Its Power and Beauty (2010) by Alfred S. Posamentier
Here's the document I went through: docs.google.com/document/d/1K1rqQfYrF2RF977F6TabLpdVXf-RnHTFju7vDRElFEk/edit?usp=sharing
The book I drew the material from is:
The Pythagorean Theorem: The Story of Its Power and Beauty (2010) by Alfred S. Posamentier
มุมมอง: 414
วีดีโอ
Pre-calculus 2e Introduction
มุมมอง 216ปีที่แล้ว
A brief overview of the course and what to expect in my videos. We will be using the Pre-calculus 2e textbook produced by OpenStax. It's a free and open source textbook available on the web and also as a PDF download. openstax.org/details/books/precalculus-2e The textbook is free to use under Attribution 4.0 International (CC BY 4.0).
Lesson 00 - Intro to Python
มุมมอง 1573 ปีที่แล้ว
The first Python lesson in the series. Using Google Colab notebooks. Follow along and try it yourself: colab.research.google.com/drive/1Po1PuE7kNV_Lsg2VBrKJNt7k45M8glDp?usp=sharing
An Occurrence At Owl Creek Bridge
มุมมอง 5333 ปีที่แล้ว
The tale of a civilian execution during the Civil War. Photo by Alex Robert on Unsplash.
The Last Leaf
มุมมอง 723 ปีที่แล้ว
O. Henry's tale of two struggling artists in Greenwich Village. Photo by Morgane Le Breton on Unsplash.
The Gift of the Magi
มุมมอง 2493 ปีที่แล้ว
The classic O. Henry tale of two lovers and their quest to buy each other Christmas gifts. Photo by Andrik Langfield on Unsplash.
A Visit From St. Nicholas
มุมมอง 3533 ปีที่แล้ว
The classic poem of St. Nicholas visiting on Christmas Eve, by Clement Clarke Moore. Photo by Norman Tsui on Unsplash.
Aesop - The Eagle and The Fox
มุมมอง 3873 ปีที่แล้ว
Aesop lived over 2,500 years ago. en.wikipedia.org/wiki/Aesop Narrator: Brian Taylor Translator: Alfred Caldecott Illustrator: Randolph Caldecott View text and illustrations for all my Aesop's Fables recordings here: drive.google.com/file/d/1BxbNlNax5J3T7PhjfSximnFh_N8HsDAN/view?usp=sharing
Thank you i failed my test
It’s almost 2025 and this shit still getting views
How find domain and range of y<-x²and y >‐1
Thank youuu
I wish i could have that inequality calculator in my watch Beside this video was super cooll i understand inequality concepts clarifying all my weakness in it thank you sir❤
this guys got a great voice.
Wait but in desmos x^2+2>x everynum is a solution tho
Thanks alot❤
How do you graph y<-x^2+4x-6
So u gotta find the vertex first then u have graph it concave down because a is negative. Then color in the inside of the parabola with a dotted line
THANKKK UUU SM
thank you but can you please post part 2
You won’t see this but thank you
How do you know the vertex?
Vertex is basically x. You can get it by using the formula -b/2a
Thx or this gold! Also I think u may have made a mistake, at 8:28 u write $4710 but in the question it says $4700... also i just realized this was 11 fricking yrs ago... i hope u r dong well!
King
The line drawn at 2:40 should intersect the y-axis below the origin and not above it. Good video though, very useful. Thanks
This is so helpful thanks! 😊
Great video.
I was expecting him to explain how he got the -7 and 2 from the factor(x+7)(x-2). If I hadn’t watch other videos before this, I would have been guessing!
Do you know why it’s like that?
@@ChaosInFluff-vh7bh Because it's the roots/zero's/x-intercepts of the quadratic. The solution of a quadratic is the x-intercepts(x,0) which is when a line touches x while y is zero and a quadratic has two x-intercepts unless it doesn't go through the x-axis. When you factor out a quadratic into say (x+7) (x-2) you want to rewrite it as x+7=0, and x-2=0 because y or f(x) = 0 (when it comes to quadratic x-intercepts) and you want to solve for x when y is zero. Plus it doesn't change the equation which makes it easy to solve for x. To solve for x in algebra you need to say move the 7 to the other side of the =, and move the 2 to the other side of the =, but when you move numbers on different sides of the = you have to switch integers (such as +7 = -7 and -2 = +2) TLDR below: TLDR: Because to solve for the x-intercept of a quadratic, the brackets must equal 0 like: x+7=0 and x-2=0, then using algebra solve for x which usually is the opposite sign, x = -7 and x = +2 P.s I'm still practicing teaching things I learned as I'm still learning myself, so I hope I explained it well enough :)
@@ChaosInFluff-vh7bh algebraically you set each factor equal to zero and solve for x, x+7=0, you subtract 7 on both sides to isolate which ends up giving X=-7, vice versa.
I have an exam so this is perfect @@manavclips
There were no videos on TH-cam, even from the most popular TH-camrs. You have saved me
oh my god it makes sense
I appreciate this playlist, I will use this to get ahead and understand the course better!
Thank you so much, you saved me on my math final
ily bro thx so much for doing my exact book man
i love you too
yo honestly thank you so much for this, this is fr like my whole book and i appreciate how youve done all the chapters. it has rly helped me
i love you
i was so confused thank u lol
you are gonna save me
Thank you so much.
love you
Hi mr. Brian
Amazing voice
Thank you.
wait... x=3 (3)^2-6>3 ..... 3>3 is false.... What am i missing here?
Sorry if its late, but yes it is false, it can only be true if the inequality symbol is 3≥3 not 3>3
Excellent video
Awesome. Merry Christmas.
You too!
Thank you sir
wa koy masabtan yawaaaa
Pareha ta bai
I am indian watching this ,,helpful
Which text book are you referring here
will this method work in regina saskatchewan?
This is gonna save me
anyone else love how satisfying it is the way he draws the parabolas? so smooth and perfect!
Very helpful! Thank you!
Why didn't you mention , making a perfect square and putting the quadratic into vertex form ? Then you don't need a graphing calculator . In vertex form you can pick off the vertex. I do like your explanation though. My daughter's teacher left it to the students - figure it out essentially
That is indeed a good way to do it, but it's in a different lesson.
why did you not find the zeros in the second example?
No zeros, since it doesn’t cross the x axis
100%waw
life saver!
Great video, really helped me out,thank you so much.
chirtdᒃᒃᑐ