What does area have to do with slope? | Chapter 9, Essence of calculus

Integrals are used to find the average of a continuous variable, and this can offer a perspective on why integrals and derivatives are inverses, distinct from the one shown in the last video. Full series: http://3b1b.co/calculus Series like this one are funded largely by the community, through Patreon, where supporters get early access as the series is being produced. http://3b1b.co/support Special thanks to the following supporters: http://3b1b.co/eoc9-thanks ------------------ 3blue1brown

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