Paper 2 June 2024, Question 5 3 marks
The first four terms of the series S can be written as
S = (1 × 2) + (2 × 3) + (3 × 4) + (4 × 5) +...
(a)
[1]
Reveal mark scheme
(b)
[2]
Show that the sum of the first n terms of S is equal to
Reveal mark scheme