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The original version of this story appeared in Quanta Magazine. Calculus is a powerful mathematical tool. But for hundreds of years after its invention in the 17th century, it stood on a shaky ...

Master the process of finding the equation of a tangent line in calculus with this step-by-step tutorial. Learn how to calculate derivatives, apply the point-slope formula, and solve problems ...

In the late 19th century, Karl Weierstrass invented a fractal-like function that was decried as nothing less than a “deplorable evil.” In time, it would transform the foundations of mathematics.