Here's the question you clicked on:
Calcmathlete
Just trying to memorize some formulas. Is this correct? \[\sum^n_{n = 1}n^2 = \frac16n(n + 1)(2n + 1)\]
Alright. Thanks :)
http://pirate.shu.edu/~wachsmut/ira/infinity/answers/sm_sq_cb.html it's the most annoying one of the common three to remember
THose will be useful in the future. I haven't been told to memorize them yet, but I'm sure they'll come up :)
they come up in proving the power rule for integrals for one thing
Oh alright. Thanks again! :)