The essence of calculus
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Further reading 1
Caption notes
Approximate a circle by thin rings and study how area accumulates. Tracking small changes gives a geometric route from integrals to derivatives.
Original passages · 5
the sum, thought of as the aggregate area of those rectangles, approaches the area under the graph.a measure of how sensitive a function is to small changesIt ties together the two big ideas of integrals and derivativescome away feeling like you could have invented calculus yourselfeach one is an inverse of the other