Paper Reference. Paper Reference(s) 6665/01 Edexcel GCE Core Mathematics C3 Advanced. Thursday 11 June 2009 Morning Time: 1 hour 30 minutes
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1 Centre No. Candidate No. Paper Reference(s) 6665/01 Edexcel GCE Core Mathematics C3 Advanced Thursday 11 June 2009 Morning Time: 1 hour 30 minutes Materials required for examination Mathematical Formulae (Orange or Green) Paper Reference Surname Signature Items included with question papers Nil Candidates may use any calculator allowed by the regulations of the Joint Council for Qualifications. Calculators must not have the facility for symbolic algebra manipulation, differentiation and integration, or have retrievable mathematical formulae stored in them. Initial(s) Examiner s use only Team Leader s use only Question Number Blank Instructions to Candidates In the boxes above, write your centre number, candidate number, your surname, initials and signature. Check that you have the correct question paper. Answer ALL the questions. You must write your answer for each question in the space following the question. When a calculator is used, the answer should be given to an appropriate degree of accuracy. Information for Candidates A booklet Mathematical Formulae and Statistical Tables is provided. Full marks may be obtained for answers to ALL questions. The marks for individual questions and the parts of questions are shown in round brackets: e.g. (2). There are 8 questions in this question paper. The total mark for this paper is 75. There are 28 pages in this question paper. Any pages are indicated. Advice to Candidates You must ensure that your answers to parts of questions are clearly labelled. You should show sufficient working to make your methods clear to the Examiner. Answers without working may not gain full credit. This publication may be reproduced only in accordance with Edexcel Limited copyright policy Edexcel Limited. Printer s Log. No. H34264A W850/R6665/ /5/5/3 *H34264A0128* Total Turn over
2 1. y A 2 1 O x Figure 1 Figure 1 shows part of the curve with equation x-axis at the point A where x = α. y x x 3 2 = , which intersects the To find an approximation to α, the iterative formula is used. 2 x + = + 2 n 1 2 ( xn ) (a) Taking x 0 = 2.5, find the values of x 1, x 2, x 3 and x 4. Give your answers to 3 decimal places where appropriate. (b) Show that α = correct to 3 decimal places. (3) (3) 2 *H34264A0228*
3 Question 1 continued Q1 (Total 6 marks) *H34264A0328* 3 Turn over
4 2. (a) Use the identity cos 2 θ + sin 2 θ = 1 to prove that tan 2 θ = sec 2 θ 1. (b) Solve, for 0 θ < 360, the equation 2 tan 2 θ + 4 sec θ + sec 2 θ = 2 (2) (6) 4 *H34264A0428*
5 Question 2 continued Q2 (Total 8 marks) *H34264A0528* 5 Turn over
6 3. Rabbits were introduced onto an island. The number of rabbits, P, t years after they were introduced is modelled by the equation 5 P = 80e 1 t, t, t 0 (a) Write down the number of rabbits that were introduced to the island. (1) (b) Find the number of years it would take for the number of rabbits to first exceed (2) (c) Find d P. dt (2) (d) Find P when d P = 50. dt (3) 6 *H34264A0628*
7 Question 3 continued *H34264A0728* 7 Turn over
8 Question 3 continued 8 *H34264A0828*
9 Question 3 continued Q3 (Total 8 marks) *H34264A0928* 9 Turn over
10 4. (i) Differentiate with respect to x (a) (b) x 2 cos3x 2 ln( x + 1) 2 x + 1 (4) (3) (ii) A curve C has the equation y= ( 4x+ 1 ), x >, y > 0 The point P on the curve has x-coordinate 2. Find an equation of the tangent to C at P in the form ax + by + c = 0, where a, b and c are integers. (6) *H34264A01028*
11 Question 4 continued *H34264A01128* 11 Turn over
12 Question 4 continued 12 *H34264A01228*
13 Question 4 continued Q4 (Total 13 marks) *H34264A01328* 13 Turn over
14 5. y O B x A Figure 2 Figure 2 shows a sketch of part of the curve with equation y = f(x), x. 1 The curve meets the coordinate axes at the points A(0,1 k) and B ( ln k,0 ), where k is a constant and k > 1, as shown in Figure 2. On separate diagrams, sketch the curve with equation 2 (a) y = f( x), (3) (b) y = 1 f ( x). (2) Show on each sketch the coordinates, in terms of k, of each point at which the curve meets or cuts the axes. Given that 2x f( x) = e k, (c) state the range of f, (1) (d) find 1 f ( x), (3) (e) write down the domain of 1 f. (1) 14 *H34264A01428*
15 Question 5 continued *H34264A01528* 15 Turn over
16 Question 5 continued 16 *H34264A01628*
17 Question 5 continued Q5 (Total 10 marks) *H34264A01728* 17 Turn over
18 6. (a) Use the identity cos( A+ B) = cos Acos B sin Asin B, to show that 2 cos 2A = 1 2sin A (2) The curves C 1 and C 2 have equations C 1 : y = 3sin2x C 2 : y 2 = 4sin x 2 cos 2x (b) Show that the x-coordinates of the points where C 1 and C 2 intersect satisfy the equation 4cos 2x + 3sin 2x = 2 (3) (c) Express 4cos2x + 3sin2x in the form R cos (2x α), where R > 0 and 0 < α < 90, giving the value of α to 2 decimal places. (3) (d) Hence find, for 0 x < 180, all the solutions of 4cos 2x + 3sin 2x = 2 giving your answers to 1 decimal place. (4) 18 *H34264A01828*
19 Question 6 continued *H34264A01928* 19 Turn over
20 Question 6 continued 20 *H34264A02028*
21 Question 6 continued Q6 (Total 12 marks) *H34264A02128* 21 Turn over
22 7. The function f is defined by 2 x 8 f( x) = 1 +, ( x + 4) ( x 2)( x + 4) x x 4, x 2 x 3 (a) Show that f( x) = x 2 (5) The function g is defined by x e 3 g( x) =, x e 2 x, x ln 2 x e (b) Differentiate g( x) to show that g( x) = x 2 (e 2) (3) (c) Find the exact values of x for which g( x) = 1 (4) 22 *H34264A02228*
23 Question 7 continued *H34264A02328* 23 Turn over
24 Question 7 continued 24 *H34264A02428*
25 Question 7 continued Q7 (Total 12 marks) *H34264A02528* 25 Turn over
26 8. (a) Write down sin 2x in terms of sin x and cos x. (b) Find, for 0 < x < π, all the solutions of the equation cosec x 8cos x = 0 (1) giving your answers to 2 decimal places. (5) 26 *H34264A02628*
27 Question 8 continued *H34264A02728* 27 Turn over
28 Question 8 continued Q8 END (Total 6 marks) TOTAL FOR PAPER: 75 MARKS 28 *H34264A02828*
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