微积分的本质

The first video of 3Blue1Brown's Essence of Calculus series, which builds toward integrals, derivatives, and the fundamental theorem of calculus from a simple geometry question. It aims to make viewers feel they could have invented calculus themselves.

Why HN likes it: A staple recommendation for anyone learning math, praised for visual intuition that makes memorized formulas make sense.

“When I discovered that video, all the formulas they tried to make me memorize started making a LOT more sense.”