{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

C4Imarks

# C4Imarks - FOR EDEXCEL GCE Examinations Advanced Subsidiary...

This preview shows pages 1–3. Sign up to view the full content.

F OR E DEXCEL GCE Examinations Advanced Subsidiary Core Mathematics C4 Paper I 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.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Solomon Press C4 I MARKS page 2 C4 Paper I – Marking Guide 1. 3 x 2 + 2 y + 2 x d d y x 2 y d d y x = 0 M1 A2 (2, 4) 12 8 + 4 d d y x + 8 d d y x = 0, d d y x = 1 3 M1 A1 grad of normal = 3 M1 y + 4 = 3( x 2) M1 y = 3 x 10 A1 (8) 2. (a) = 1 1 2 2 1 4 4 (1 ) x = 2(1 1 2 1 4 ) x B1 = 2[1 + ( 1 2 )( 1 4 x ) + 1 1 2 2 ( )( ) 2 ( 1 4 x ) 2 + …] = 2 1 4 x 1 64 x 2 + … M1 A2 (b) x < 4 B1 (c) x = 0.01 (4 1 2 ) x = 3.99 = 399 100
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}