SL Harder Sum of AP Exam Qus
The most common errors on sums of sequences (and nth term) questions; in applied contexts, tend to be: (a) clarifying whether it is a sum of a sequence or an nth term question.(b) solving a quadratic (or other) equation quickly using the calculator (rather than rearranging and using the quadratic formula or completing the square/factorising etc. Full worked SOLUTIONS providing step-by-step guidance for Casios and...