Summing Series and the Method of Differences (AQA A-Level Further Maths): Quizzes

Sum of all terms from $u_1$ to $u_n$

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

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

$\frac{n^2(n+1)^2}{4}$

$\sum r^3 = \left(\sum r\right)^2$

When $u_r = f(r+1) - f(r)$

$f(n+1) - f(1)$

No, they must be memorised

Writing differences vertically

The general term