Sums of Integers, Squares & Cubes (Edexcel A-Level Further Mathematics): Flashcards

$\frac{n(n+1)}{2}$

$\frac{n(n+1)(2n+1)}{6}$

$\left[\frac{n(n+1)}{2}\right]^2$

$\sum a_r + \sum b_r$

$c \sum a_r$

$\left[\sum_{r=1}^n r\right]^2$ or $\left[\frac{n(n+1)}{2}\right]^2$

$385$

$36$

$225$

Coefficients