Classroom Blog The sum of the squares Introduction In this article, we will look at several proofs for a famous formula. Formula: Sum of the squares $$\sum_{r=1}^{n}r^2=\frac{n}{6}(n+1)(2n+1)$$ Mathematical induction We begin with the base case, \(n=1\). The …

Classroom Blog Cell Biology Follow one of our students as she explains the structure of the fundamental building blocks of complex life: the cell.