(2) 261 1 is a prime number. − (c) Explain why 261 + 1 is a multiple of 3 (2) (Total for question = 6 marks) 2. Prove that (2n + 3)² (2n 3)² is a multiple of 8 – – for all positive integer values of n. (Total for Question is 3 marks) 3. (a) Expand and simplify (y 2)(y 5) − − ........................................................... (2)
(2) 261 − 1 is a prime number. (c) Explain why 261 + 1 is a multiple of 3 (2) (Total for question = 6 marks) 2. Prove that (2n + 3)² – (2n – 3)² is a multiple of 8 for all positive integer values of n. (Total for Question is 3 marks) 3. (a) Expand and simplify (y − 2)(y − 5) ........................................................... (2)
Revision_Guide_Aiming_for_Grade_9.docx