Prime DSE Series - Mathematics Mock Exam Papers (Extended Part) Module 2 Set 3

HKDSE-MATH-EP(M2)(Set 3) − 2 2 © United Prime Educational Publishing (HK) Ltd. Answers written in the margins will not be marked. Answers written in the margins will not be marked. Answers written in the margins will not be marked. **************************************************************************** SECTION A (50 marks) 1. Let a be a constant. If the coefficient of 7 x in the expansion of 5 2 1 (1 ) 2 2 ax x x   +  −    is 800 , find a and the constant term in the expansion. (5 marks) Sample © United Prime Educational Publishing (HK) Limited All rights reserved; no part of this publication may be reproduced, photocopied, recorded or otherwise, without the prior written permission of the Publisher.