I actually found this explanation pretty long winded and confusing.
This is shorter, to the point, and more general:
math.stackexchange.com/a/2482811/2...
Just plug in P = 2.
Granted, the approach is not exactly intuitive, but once you see how it's done, you can simply rederive it.
Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink.
Hide child comments as well
Confirm
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
I actually found this explanation pretty long winded and confusing.
This is shorter, to the point, and more general:
math.stackexchange.com/a/2482811/2...
Just plug in P = 2.
Granted, the approach is not exactly intuitive, but once you see how it's done, you can simply rederive it.