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JaberTime
United States
เข้าร่วมเมื่อ 24 ส.ค. 2008
Math Lecture videos with pictures and simplified examples from Algebra to Calculus and Linear Algebra.
วีดีโอ
Riemann Sum. Right Hand, Left Hand and Midpoint Rule.
มุมมอง 415 หลายเดือนก่อน
Thanks for watching! JaberTime
![Optimization. What is the Maximum Vertical Distance between y=x+2 and y=x^2 for x in [-1, 2].](http://i.ytimg.com/vi/iY7hPd6xQxE/mqdefault.jpg)
Optimization. What is the Maximum Vertical Distance between y=x+2 and y=x^2 for x in [-1, 2].
มุมมอง 995 หลายเดือนก่อน
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Curve Sketching. Inc. & Dec. Concave Up. Concave Down, Abs Max and Abs Min. The Extreme Value Th.
มุมมอง 525 หลายเดือนก่อน
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Optimization. Find two positive numbers whose Product is 100 and whose Sum is a Minimum.
มุมมอง 5385 หลายเดือนก่อน
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The Mean Value Theorem.
มุมมอง 745 หลายเดือนก่อน
Let f(x) = -3x^2 2x 4. Find the value(s) of x that satisfy the Mean Value Theorem on the interval [ -1, 1 ]. Graph the Secant Line, the Tangent Line and f(x). Thanks for watching! JaberTime
A man 6-ft tall walks away from a streetlight mounted on a 15-ft tall pole at a rate of 5-ft/s.
มุมมอง 2816 หลายเดือนก่อน
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Find the linearization of the function f(x) = SQR(x+5) at a = 4 and use it to approximate SQR (3.8).
มุมมอง 526 หลายเดือนก่อน
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Find the limit as x approaches " - infinity". L'Hospital's Rule " infinity * zero".
มุมมอง 716 หลายเดือนก่อน
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Find the limit as x Approaches 0 of (e^4x -1-4x)/x^2. L'Hospital's Rule_ Intermediate form (0/0).
มุมมอง 1006 หลายเดือนก่อน
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Differentiate y=SQR ( 1+4 sin(x)). And find equations of the tangent line and the normal at (0, 1).
มุมมอง 666 หลายเดือนก่อน
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Implicit Differentiation. Find dy/ dx for 2x^3+x^2y-xy^3=2.
มุมมอง 2326 หลายเดือนก่อน
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Differentiate the following y = e^(cosx) + cos(e^x)
มุมมอง 2.4K6 หลายเดือนก่อน
Differentiate the following y = e^(cosx) cos(e^x)
Epsilon and delta Explained with an Example in Calculus.
มุมมอง 1097 หลายเดือนก่อน
Epsilon and delta Explained with an Example in Calculus.
Evaluate the Limit, or state that it does not exist.
มุมมอง 1957 หลายเดือนก่อน
Evaluate the Limit, or state that it does not exist.
Math 104 "Math Reasoning for Elementary Teachers". Final Review 20 Questions.
มุมมอง 2339 หลายเดือนก่อน
Math 104 "Math Reasoning for Elementary Teachers". Final Review 20 Questions.
Evaluate the indefinite integral as an infinite series.
มุมมอง 2129 หลายเดือนก่อน
Evaluate the indefinite integral as an infinite series.
Find the Maclaurin Series of f(x), and find the associated Radius of Convergence.
มุมมอง 1349 หลายเดือนก่อน
Find the Maclaurin Series of f(x), and find the associated Radius of Convergence.
Test the Series for Convergence or Divergence.
มุมมอง 619 หลายเดือนก่อน
Test the Series for Convergence or Divergence.
Find a power Series Representation for the Function. And Determine the Interval of Convergence.
มุมมอง 619 หลายเดือนก่อน
Find a power Series Representation for the Function. And Determine the Interval of Convergence.
Determine whether the series is Absolutely Convergent, Conditionally Convergent, or Divergent.
มุมมอง 629 หลายเดือนก่อน
Determine whether the series is Absolutely Convergent, Conditionally Convergent, or Divergent.
Test the Series for Convergence or Divergence.
มุมมอง 1439 หลายเดือนก่อน
Test the Series for Convergence or Divergence.
Determine whether the Series is Convergent or Divergent.
มุมมอง 769 หลายเดือนก่อน
Determine whether the Series is Convergent or Divergent.
your voice is very soothing bro very nice
Thank you genius sir just subbed
Thanks for the sub!
Thanks a lot sir for all ur videos....in very clear way...logic explained
You're most welcome
Thank you very much. This is very helpful!!
Glad it was helpful!
Thank you sir 🐬✨
You are very welcome.
Wonderful job!
Glad you like it!
Here all people on digital design evil class. 😂 bruh, well explained.
he is the best in the world!
Thank you for the comment! It is JaberTime 24/7.
Well Explained
Thank you!
Thank you !! 🎉😊
You're welcome 😊
Thanks, am good to go
You are welcome!
Hello, good afternoon. Excuse me, from what book did you get this problem?
That was a while ago, I don’t remember.
🎉
Thank you sir
You are welcome.
Thank you sir for teaching!
You are very welcome
Excellent way of explaining. Made it so easy to understand. Thank you doctor. I am already in love with "Who am I" problems.
Glad it was helpful!
@@19917119 Thank doctor. I appreciate your help. Magdy
Shouldn't you have integrated from 0 to 5 instead since you have to bring the water over the edge of the pool?
If the slice lies x sub i "*" ft below the edge of the pool ( where x sub i "*" is greater than or equal to 1 and less than or equal to 5), then the work needed to pump it out is 9000 pi x sub i "*" delta x. Thus W = integration of 9000 pi x dx from 1 to 5. Think about if the depth of the water only 2 ft, are we going to integrate from 0 to 5 still or from 3 to 5? If we integrate in both cases ( with water of depth 4 ft or 2 ft) and in both cases we integrate from 0 to 5, then the depth of water will not affect the answer which is not true. Just think about the SLICE with x varies from 1 to 5.
Thank you!
You're welcome!
Excellent job thank you
Our pleasure!
omg thank you so much
Happy to help
Thank you for your videos!
Glad you like them!
Alternatively, you can just do the sqrt(100), as by definition, the sum is minimized by the smallest two factors (which is the sqrt).
👍👍👍
How about this: The product is 147 and the sum of the first number plus three times the second number is a minimum.
f(x) = x +100/x; f'(x) = 1 -100/x^2 ... which is zero when x=10 ; f"(x) = 200/x^3 ; which >0 for x>0 ... so f() has a minimum at x=10. No "sampling" of f() or f'() near 10 is necessary (or even *fun*). So unless producing a graph was part of the problem ... why bother?
You are 100% right. JaberTime
this video is very helpful for understanding this section. Thank you!
Glad to hear that!
10 and 10
Yes.
Amazing explanation thank you got to the point
You're welcome!
What an amazing video.
Glad you think so!
amazing thank you
Thank you too!
im in engineering and i have an integral exam tomorrow thats 50% of my grade and this helped a lot thank you!!!!
Glad to know that it was helpful. JaberTime
super helpful thanks! Just curious about what the polar coordinates are for the xz plane?
For the xz Plane, You just treat it like the xy plane. The Z plane will be treated as if it is the y plane. x = r cos theta and z = r cos theta. Here is another video about the Polar form in the xy- plane: Calculate the iterated integral by converting it to polar coordinates. The double integral of ( x+ y ) where x varies from y to the square root of (2 - y^2), and y varies from 0 to 1. th-cam.com/video/uvgXy1YuBsI/w-d-xo.html JaberTime
Aren't the bounds for z between 0 and 2? what did I do wrong? because x^2+y^2=1, I just subbed it in the given equation
Above the Plane Z = 0, and Below the cone z^2 = 4x^2 +4y^2. The Cone is the upper bound. Z^2 = 4( x^2 +y^2) , or z^2 = 4 r^2; that is z =2r. Look the picture and if r for example is 0.6 ( somewhere between 0 and 1. then going up you will be hitting the cone and the Z value at that location will be z = 2r = 2 (0.6) = 1.2 JaberTime
Thank you very much for your helpful video.
Glad it was helpful!
Thank you so much,on my way to my em1 final exam couldn’t have found a better video!
Glad it helped!
could u also evaluate this using spehrica. coordinates
let u = x ln x y = 3^u = e^(u ln 3) dy/du = ln 3 e^(u ln 3) = ln 3 3^(x ln x) du/dx = ln x + 1 dy/dx = dy/du du/dx = ln 3 3^(x ln x)(ln x + 1)
YES!!!! You are 100% correct. Sometimes, we can approach the math problems in different ways. I was in my video referring to rules in our section that I am teaching. JaberTime
I think taking log on both sides is easier to understand. at least for me
y = 3^(x ln x) ln( y ) = ln [3^(x ln x) ] ln (y) = (x ln x ) * ln 3 d/dx [ ln (y) ] = d/dx [ (x ln x ) * ln 3 ] y'/y = ln 3 * d/dx [ x ln x ] y'/y = ln 3 * [ 1 + ln x ] y' = y * ( ln 3 * [ 1 + ln x ] ) y' = 3^(x ln x) * ( ln 3 * [ 1 + ln x ] ).
Yes, you are correct. Sometimes, we can approach the math problems in different ways. I was in my video referring to rules in our section that I am teaching. In some examples in calculus finding the limits at the begging of the course we teach students different ways of finding the limits, like dividing the numerator and the denominator by the highest degree term from the denominator. and sometimes multiplying by the conjugate. Later on in the course, we use L'Hospitals's Rule. JaberTime
Cooool 👍🏻👏🏻
Thank you! I feel that I needed to show the other side of me. Dancing with teachers and students at our High School.
We need more people like this.
Thank you! It makes my day to hear that and to make more videos.
great.a short video directly to the point
Glad it was helpful!
I really appreciate everything. Thank you very much.
So nice of you
u missed the negative
The derivative of Cosh (x) is Sinh (x) and it is not negative Sinh (x).
This is the best explanation I’ve ever seen, thank you.
Glad it was helpful!
when t=0 ,then x=1,y=0,fine when t=360 what about z???will the z ( i mean height) for one cycle magnitude reach 360?
T is in radians, not degrees. If you are referring to the last example " the Helix" , then the height will keep increasing in radians. If you are not referring to the last example, let me know which example and I will explain more.
I might be wrong, but for limits of type "0/0" we can use L'Hôpital's rule and compare derivatives of the functions [ SQR (9+h) - 3] and h, which are: (1/2)*[1/SQR (9+h)] and 1, respectively. With h->0 we have indeed lim = 1/6. Nice approach in the video, this was the second option I'd come up with, not at once, admittedly. .
Yes, you are right. This Semester I am teaching Calculus One. and The limits in Chapter one do not use L'Hospital's Rule yet. In Chapter One we cover [ The limit as a Function, Continuity, and Limits involving Infinity]. In Chapter Two we cover Derivatives. After that in Chapter Three, we talk about Indeterminate Forms and L'Hospital's Rule. JaberTime
@@19917119 I see. There's always more than one approach to a math problem, as we all know. Sometimes math students, even at this advanced level, still don't understand this simple truth, so it might be a good idea to emphasize this fact when the opportunity arises. It would be nice to come back to this particular problem after Chapter Three and to explain how L'Hospital's Rule is more general (and powerful) approach than this simple techique. Just sayin'.
I agree. More videos will be coming during this semester for Calculus I. JaberTime
By the way, Calculus is my favorite class. JaberTime
Thank you Jaber time for everything you do it’s very helpful. Thank you.
You are welcome!
Thanks a lot. I love space curves.
Me too!
Amazing
Thank you! Cheers!
Can you make a video explaining non-base 10 systems? this was so much more help to me than my teachers video!
Will do. What base do you want and what operation? Adding or converting to other base?
Do for 7
Hi, Do you need help or have a question for base 7?
add the videos that involve sin and cos
Hi, The polar Forms do uses the sine and cosine. However, I will look for more examples that involve sin and cos.