Wednesday, 27 February 2019

summation - Having trouble understanding why sumni=1i2=fracn(n+1)(2n+1)6

So I understand ni=1i2=n(n+1)(2n+1)6 but I'm not sure how to come to that conclusion. Having trouble understanding

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real analysis - How to find limhrightarrow0fracsin(ha)h

How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...