Edexcel Mathematics October 2021 · Paper 1 · Question 15 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

October 2021 · Paper 1 · Question 15 · 6 marks

15. (i) Use proof by exhaustion to show that for n ∈ , n  4 (n + 1)3 > 3n (2) (ii) Given that m3 + 5 is odd, use proof by contradiction to show, using algebra, that m is even. (4) 49 50 51 52  

Lesson: Proof by Deduction