Another example might be if you need to create some kind of enclosure. Lets say you have a limited amount of fencing available and you want to make a rectangular enclosure. What should the dimensions of your rectangle be in order to maximize the area encompassed by the enclosure? I'm not sure...

## Answers by Amol V.

I also don't know what you mean by the golden rule for an antiderivative. However, one of the most useful formulas when taking the antiderivative of a single term of the form xn is ∫xndx = xn+1/(n+1).