Can you find the exact value of this beautiful sum?

In this video we looked into the solution to a beautiful summation problem with a very detailed explanation.
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#mathematics #simplemathstricks #calculus #algebra #algebratricks #olympiadmaths #aimemath

[@alexbennie]

I love the casual, almost cynical tone in a math video! Also, one of my favourite tricks, where one adds a number to get an obvious pattern, and then quickly subtracts it before anyone notices. In less than 5 mimutes! Well done.

[@xxxyyyzzz8909]

Wow. Brilliant solution ❤ Love it!