abc Mark Scheme Mathematics 4302 Specification B General Certificate of Secondary Education Module 5 Paper 1 Tier H 43005/1H

Transcription

1 Version : 1.0: abc General Certificate of Secondary Education Mathematics 4302 Specification B Module 5 Paper 1 Tier H 43005/1H Mark Scheme 2008 examination - November series

2 Mark schemes are prepared by the Principal Examiner and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation meeting attended by all examiners and is the scheme which was used by them in this examination. The standardisation meeting ensures that the mark scheme covers the candidates responses to questions and that every examiner understands and applies it in the same correct way. As preparation for the standardisation meeting each examiner analyses a number of candidates scripts: alternative answers not already covered by the mark scheme are discussed at the meeting and legislated for. If, after this meeting, examiners encounter unusual answers which have not been discussed at the meeting they are required to refer these to the Principal Examiner. It must be stressed that a mark scheme is a working document, in many cases further developed and expanded on the basis of candidates reactions to a particular paper. Assumptions about future mark schemes on the basis of one year s document should be avoided; whilst the guiding principles of assessment remain constant, details will change, depending on the content of a particular examination paper. Further copies of this Mark Scheme are available to download from the AQA Website: Copyright 2008 AQA and its licensors. All rights reserved. COPYRIGHT AQA retains the copyright on all its publications. However, registered centres for AQA are permitted to copy material from this booklet for their own internal use, with the following important exception: AQA cannot give permission to centres to photocopy any material that is acknowledged to a third party even for internal use within the centre. Set and published by the Assessment and Qualifications Alliance. The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales (company number ) and a registered charity (registered charity number ). Registered address: AQA, Devas Street, Manchester 5 6EX Dr Michael Cresswell Director General

3 The following abbreviations are used on the mark scheme: M A B M dep ft SC eeoo Method marks awarded for a correct method. Accuracy marks awarded when following on from a correct method. It is not necessary always to see the method. This can be implied. Marks awarded independent of method. A method mark which is dependent on a previous method mark being awarded. Follow through marks. Marks awarded for correct working following a mistake in an earlier step. Special Case. Marks awarded for a common misinterpretation which has some mathematical worth. Or equivalent. Each error or omission. 3

4 MODULE 5 HIGHER TIER 43005/1H 1 1 (5 + 7) cm 2 Units mark 2(a) x 2 (x 4) B2 for x(x 2 4x) 2(b) 196 or 784 or or or 14 (196 56) (14 4) or 14( ) 3 Line 7 cm drawn or line 5 cm drawn Angle of 70º ± 2º Parallelogram completed - fully correct ± 1 mm 4(a) or (b) or or Accept 40 seen as acute < next to x Accept 20 seen on diagram either opposite to y in parallelogram or alternate to y 4

5 5(a)(i) 12 5(a)(ii) n 5(a) (iii) 100 ( ) 2 or ( ( 1)) (b) 1, 3, 5, 7 B2 Condone missing brackets for 3 terms correct eg for 1, 3 B0 for B0 for (a) 6x 2x = 7 9 4x = (b) 21a 15b + 8a 6b Allow one error 29a or 21b 6(c) 29a 21b Do not allow further working Award for 5 in numerator or 5 as answer to denominator or or 440 dep dep

6 8(a) 8 9 8(b) w 4 8(c) 3 4 = 12 Should be x 6 Should have added the powers 8(d) 3y 4 z 2 B2 for two correct terms 9(a) 2nd and 4th boxes indicated B2 9(b) Example of formula with two letters that is not area for one or two correct (and one incorrect) Accept eg 2l + 2w (represents length) Condone 2πr length Condone πr 2 h (volume) Condone use of π as a letter Not correct May be implied 10(a) (b) 10 2 (i) (b) (ii) dep Allow unsimplified y = x + 10 ft 5 Measuring 13 scores scores scores 1 ft their gradient 6

7 11(a) 10x(2x + 3) Area of base = 90 or = 90 20x x = 900 x(2x + 3) = 90 2x 2 + 3x = 90 or 20x x 900 = 0 11(b) (2x ± a)(x ± b) where ab = 90 Use of formula (allow one error) (2x + 15)(x 6) Use of formula with no errors (x =) 15 and ± 3 2 4(2)( 90) (c) seen 1:2 3 or 2 3 :1 seen 1 Sight of 3 or 7.5 or x or x or dep x + 5 3x B3 for (2x 5)(2x + 5) for 3x(2x 5) 7

8 13(a) (i) 2s + t + s + 2t or 3s + 3t 3AB or 3(s + t) 13(a) (ii) 3:1 13(a) (iii) Collinear 13(b) 1 FG = 4 or FG 2 = 17 Gradient of FG = 4 4 or FH = 1 or FH 2 = 17 3 GH = 5 or GH 2 = 34 1 Gradient of FH = 4 FH. FG Cos F = (= 0) = 0 and F = (= 1) or (= 34) (Pythagoras) or FH. FG = 4 4 (= 0) = 1 and F = 90 = 34 (Pythagoras) 90º or = 34 and F = 90 or FH. FG = 0 and F = 90 8