What happens when the rate of change of x depends on the value of x itself?
Discover some answers here.
Here is a lovely, simple explanation of how limits and infinitesimals work (and when they don’t).
Well worth a read, because it isn’t afraid to tell the whole story in non-technical language.
Patrick Andrews has a PhD in Mechanical Engineering from Heriot-Watt University and an MSc in Neuroscience from the University of Cambridge.
A former Chartered Engineer and Chartered Mathematician, Patrick has worked in management consultancies and high-tech startups, and in academia as a postdoc in Applied Mathematics at Cambridge and a maths lecturer at De Montfort University.
Patrick is the father of three delightful (but not uniformly mathematical!) daughters.