C4Kmarks - FOR EDEXCEL GCE Examinations Advanced Subsidiary...

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F OR E DEXCEL GCE Examinations Advanced Subsidiary Core Mathematics C4 Paper K MARKING GUIDE This guide is intended to be as helpful as possible to teachers by providing concise solutions and indicating how marks could be awarded. There are obviously alternative methods that would also gain full marks. Method marks (M) are awarded for knowing and using a method. Accuracy marks (A) can only be awarded when a correct method has been used. (B) marks are independent of method marks. Written by Shaun Armstrong Solomon Press These sheets may be copied for use solely by the purchaser’s institute.
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Solomon Press C4 K MARKS page 2 C4 Paper K – Marking Guide 1. = π 3 1 2 (3 1) x x + d x M1 = π 3 1 2 9 6 1 x x x + + d x = 3 1 (9 x + 6 + 1 x ) d x A1 = π [ 9 2 x 2 + 6 x + ln x ] 3 1 M1 A1 = π {( 81 2 + 18 + ln 3) ( 9 2 + 6 + 0)} M1 = π (48 + ln 3) A1 (6) 2. (a) (1 3 x ) 2 = 1 + ( 2)( 3 x ) + ( 2)( 3) 2 ( 3 x ) 2 + ( 2)( 3)( 4) 3 2 × ( 3 x ) 3 + … M1 = 1 + 6 x + 27 x 2 + 108 x 3 + … A3 (b) 2 2 1 3 x x = (2
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