Video Tutorial: Taking Derivatives – Everything You Need to Know in 20 Minutes

I like to think this is a good introduction or refresher for anybody who needs to know what derivatives are and how to find them. This covers at least a quarter of everything you learn in your first year of calculus in just twenty minutes, so it’s probably worth watching more than once. Let me know what you think, and feel free to ask questions in the comments if anything’s not clear to you.

“The Invisible Gorilla” – Daniel Simons on the Limits of Perception

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