![Curve Hunter](/sites/default/files/styles/medium/public/thumbnails/content-id-7085-icon.jpg?itok=x_PDYEPO)
Turning points
![Curve Hunter](/sites/default/files/styles/medium/public/thumbnails/content-id-7085-icon.jpg?itok=x_PDYEPO)
![Curve fitter](/sites/default/files/styles/medium/public/thumbnails/content-id-6427-icon.jpg?itok=-4CJiuFF)
problem
Curve fitter
This problem challenges you to find cubic equations which satisfy different conditions.
![Patterns of inflection](/sites/default/files/styles/medium/public/thumbnails/content-id-7197-icon.jpg?itok=pMDau1Sp)
problem
Patterns of inflection
Find the relationship between the locations of points of inflection, maxima and minima of functions.
![Placeholder: several colourful numbers](/themes/nrich/images/nrich_small_placeholder.png)
problem
Bird-Brained
How many eggs should a bird lay to maximise the number of chicks
that will hatch? An introduction to optimisation.
![Calculus analogies](/sites/default/files/styles/medium/public/thumbnails/content-id-7087-icon.jpg?itok=usQFW1k8)
problem
Calculus analogies
Consider these analogies for helping to understand key concepts in
calculus.
![Scientific curves](/sites/default/files/styles/medium/public/thumbnails/content-id-6583-icon.png?itok=zBVVkEYc)
problem
Scientific curves
Can you sketch these difficult curves, which have uses in
mathematical modelling?
![Least of All](/sites/default/files/styles/medium/public/thumbnails/content-id-6009-icon.jpg?itok=xOaeZ9AU)
problem
Least of All
A point moves on a line segment. A function depends on the position
of the point. Where do you expect the point to be for a minimum of
this function to occur.
![Quick Route](/sites/default/files/styles/medium/public/thumbnails/content-id-4749-icon.jpg?itok=7pU6-fr5)
problem
Quick Route
What is the quickest route across a ploughed field when your speed
around the edge is greater?
![Exponential Trend](/sites/default/files/styles/medium/public/thumbnails/content-id-2677-icon.png?itok=lAILU7x3)
problem
Exponential Trend
Find all the turning points of y=x^{1/x} for x>0 and decide
whether each is a maximum or minimum. Give a sketch of the graph.
![Discrete Trends](/sites/default/files/styles/medium/public/thumbnails/content-id-2675-icon.jpg?itok=L-Xk4DzV)
problem
Discrete Trends
Find the maximum value of n to the power 1/n and prove that it is a
maximum.