MathCastle
Counting & ProbabilityMediumBinomial Theorem, Pascal & Combinatorial Identities

Binomial Theorem, Pascal & Combinatorial Identities · Medium problem

Using k2=2(k2)+(k1)k^2=2\binom{k}{2}+\binom{k}{1} and the Hockey Stick Identity, evaluate ∑k=110k2\displaystyle\sum_{k=1}^{10}k^2.