The Pi Hunt

Solve the activity to get the next symbol of the passphrase

Activity 5

You know, as a famous number, I appear in many places. Many hard integrals, sums, limits, and other complex equations evaluate to me! Here is one, for a good measure.

integral from 0 to infinity of the natural logarithm of one plus one over x squared dx equals pi

Well, take the indefinite version of this beautiful integral and solve it! How many distinct letters do you see in the answer? Note that I don't really like the constant added in the end, as it can be any symbol theoretically. So, for your own sake, let's just skip that this time, but only this time, you should still write it in your calculus exam! Well, the amount of letters you see is the symbol you need. Good luck!

You can find the next QR code in Main Building 1st Floor