Calculus: Derivatives 0.5
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Yeah, we need to clone this guy and put one of him in every school in the country. A Math teacher that is effective at teaching Math....priceless.
3 years ago 51
All Comments (73)
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Thank you so much, you completely blow away my current calculus teacher who doesn't even enjoy the material himself and acts as if he hates his job. You always have a smile in each video and show enthusiam in solving these problems. You have saved my calculus grade.
4 months ago 4
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You are amazing at mathematics, and an amazing teacher, but I swear, you say "h" so much it starts to sound weird. Aetch Aetch Aetch. Weird.
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If this guy taught math to everybody in america there would be no poverty in the world.
6 months ago 3
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Whenever I see your videos, I just send blessings out for you.
You are a LIFE saver. And i only wish teaching were as real and concept based as yours everywhere as compared to the artificial rote learning it has become.
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His method is the classical one given by all standard texts. Here is my problem: His and everyone else's answer to finding the derivative of x^2 comes out as 2x+h. Then they conveniently delete the h calling it zero leaving 2x as the EXACT answer.
Well, if h is zero then dividinq any quantity by zero makes no sense. And if h is not really zero but "almost" zero then answer is not EXACTLY 2x but 2x+h no matter how small the h. No one discusses this uncomfortable fact. I have a logical answer
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His method is the classical one given by all standard texts. Here is my problem: His and everyone else's answer to finding the derivative of x^2 comes out as 2x+h. Then they conveniently delete the h calling it zero leaving 2x as the EXACT answer.
Well, if h is zero then dividinq any quantity by zero makes no sense. And if h is not really zero but "almost" zero then answer is not EXACTLY 2x but 2x+h no matter how small the h. No one discusses this uncomfortable fact. I have a logical answer
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wonderful teacher and explaination.
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that was a good video. but what happened with the other h that didn't divide out?
MathMikie 3 years ago
As h goes to 0, 2x+h goes to 2x+0, which is 2x.
MathTV 3 years ago 18