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

HKDSE-MATH-EP(M2)(Set 3) − 5 5 © 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. Go on to the next page Please stick the barcode label here 4. Let 2 f ( ) ln( 2 5) x x x = − + . Denote the graph of f ( ) y x = by Γ . (a) Find f ( ) x ′ and f ( ) x ′′ . (b) Find the range of values of x such that Γ is concave upward. (c) Someone claims that there are two points of inflexion of Γ . Do you agree? Explain your answer. (7 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.