A-Level
EDEXCEL
Mathematics & Further Mathematics
January 2020
QP-202001-Further Mathematics-UFP1 · Question 9
Question (excerpt):
24 9. (i) f(n) = 7 n(3n + 1) – 1 Prove by induction that, for n ∈ +, f(n) is a multiple of 9 (6) (ii) A sequence of numbers is defined by u1 = 2 u2 = 6 un+2 = 3un+1 – 2un n ∈ + Prove by induction th…
24 9. (i) f(n) = 7 n(3n + 1) – 1 Prove by induction that, for n ∈ +, f(n) is a multiple of 9 (6) (ii) A sequence of numbers is defined by u1 = 2 u2 = 6 un+2 = 3un+1 – 2un n ∈ + Prove by induction th…
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