Show that Ʃn i2 = n(n+1)(2n+1)/6, n>=1 i=1 Should I use the formula Ʃn i = n(n+1)/2 i=1 and if so, how would I go about doing this?
Follow Math Help Forum on Facebook and Google+
Originally Posted by jaclyn91 Should I use the formula Ʃn i = n(n+1)/2 i=1 Yes, this works.
Now, use this simple fact:
So the sum becomes now this is
I think you can take it from there.
View Tag Cloud