c3 jan 2012
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6665/01Edexcel GCECore Mathematics C3AdvancedMonday 23 January 2012 – MorningTime: 1 hour 30 minutes
Materials required for examination Items included with question papersMathematical Formulae (Pink) 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 or symbolic differentiation/integration, or have retrievable mathematical formulae stored in them.
Instructions to CandidatesIn 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 CandidatesA 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 24 pages in this question paper. Any blank pages are indicated.
Advice to CandidatesYou 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.
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*P40084A0124*
Candidate No.
This publication may be reproduced only in accordance with Pearson Education Ltd copyright policy. ©2012 Pearson Education Ltd.
Printer’s Log. No.
P40084AW850/R6665/57570 5/7/5/
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1. Differentiate with respect to x, giving your answer in its simplest form,
(a) x x2 3ln ( )(4)
(b) sin 43
x
x (5)
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Question 1 continued
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(Total 9 marks)
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2.
P(–3, 0)
Q(2, –4)
y
xO
Figure 1
Figure 1 shows the graph of equation y = f (x).
The points P (– 3, 0) and Q (2, – 4) are stationary points on the graph.
Sketch, on separate diagrams, the graphs of
(a) y x= +( )3 2f(3)
(b) y x= ( )f(3)
On each diagram, show the coordinates of any stationary points.
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Question 2 continued
Q2
(Total 6 marks)
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3. The area, A mm2, of a bacterial culture growing in milk, t hours after midday, is given by
A t= 20 1 5e . , t 0
(a) Write down the area of the culture at midday.(1)
(b) Find the time at which the area of the culture is twice its area at midday. Give your answer to the nearest minute.
(5)
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Question 3 continued
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(Total 6 marks)
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4. The point P is the point on the curve x y= +⎛⎝⎜
⎞⎠⎟
212
tan π
with y-coordinate
4π .
Find an equation of the normal to the curve at P.
(7)
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Question 4 continued
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(Total 7 marks)
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5. Solve, for 0 180°,
2cot2 3 7 cosec 3 – 5
Give your answers in degrees to 1 decimal place.(10)
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Question 5 continued
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(Total 10 marks)
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*P40084A01224*
6. f cosx x x x( ) = − + ( )2 123 2 , 0 x
(a) Show that the equation f (x) = 0 has a solution in the interval 0.8 < x < 0.9(2)
The curve with equation y = f (x) has a minimum point P.
(b) Show that the x-coordinate of P is the solution of the equation
xx
=+ ( )3
2
12sin
(4)
(c) Using the iteration formula
xx
xnn
+ =+ ( )
=1
12
0
32
2sin
,
find the values of x1, x2 and x3 , giving your answers to 3 decimal places.(3)
(d) By choosing a suitable interval, show that the x-coordinate of P is 1.9078 correct to 4 decimal places.
(3)
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Question 6 continued
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Question 6 continued
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Question 6 continued
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(Total 12 marks)
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*P40084A01624*
7. The function f is defined by
f : , ,xx
x x xx x�
3 12 7 4
14
122
+( )+ −
−+
∈R >
(a) Show that f xx
( ) =−
12 1 (4)
(b) Find f − ( )1 x(3)
(c) Find the domain of f −1
(1)
g lnx x( ) = +( )1
(d) Find the solution of fg x( ) = 17
, giving your answer in terms of e.(4)
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Question 7 continued
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Question 7 continued
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Question 7 continued
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(Total 12 marks)
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*P40084A02024*
8. (a) Starting from the formulae for sin ( A + B ) and cos ( A + B ), prove that
tan tan tantan tan
A B A BA B
+( ) = +−1 (4)
(b) Deduce that
1 3tantan6 3 tanπ θθ
θ+⎛ ⎞+ =⎜ ⎟⎝ ⎠ − (3)
(c) Hence, or otherwise, solve, for 0� �θ π ,
1 3 3+ = −( ) −( )tan tan tanθ θ π θ√ √
Give your answers as multiples of (6)
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Question 8 continued
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*P40084A02224*
Question 8 continued
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Question 8 continued
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*P40084A02424*
Question 8 continued
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TOTAL FOR PAPER: 75 MARKS
END
Q8
(Total 13 marks)