related rates, heating up a circular metal plate,
Related rates example, this problem is taken from Single Variable Calculus, by James Stewart, 8th Ed, early transcendental,
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Practice#2, https://youtu.be/A45rzfoqveE ,
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related rates, water rising in an inverted circular cone,
Related rates example, this problem is taken from Single Variable Calculus, by James Stewart, 8th Ed, early transcendental,
For file, please see https://blackpenredpen.com/calc1
For playlist, see…

related rates, two cars approaching to the same intersection Related rates example, this problem is taken from Single Variable Calculus, by James Stewart, 8t...

Graphing f(x)=x^2-x-ln(x),

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In this video, I calculate the half-derivative of 1, using the formula for the half-derivative. Warning: The answer is not 0. Enjoy!

What is the radius of the circle, in simplest terms involving a, b, and c? I read that even the great mind Richard Feynman made a mistake. Watch the video to learn the common mistake and what the correct answer is.

Source Feynman story
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Check out bootstrapboards: https://bootstrapboards.com/partner/blackpenredpen/ 10% coupon code: BLACRD18 examples of the functions: f(x)=x*abs(x), f(x)=x^(4/...

A short animation about a visual solution to an alternating series:)

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