ࡱ> >@=e@ 1ZbjbjFF h,,^&^^^^4&h l&:B!T"L"""000: : : : : : :$;R>l-:Qc11/N0c1c1-:^^"" ~:#9#9#9c1^""":#9c1:#9#9r#9"6! `u8v?2#99:0:#9>4 >#9&&^^^^>#90"0#900000-:-:&&d$70&&Paper Reference(s) 6665/01 Edexcel GCE Core Mathematics C3 Advanced Subsidiary Monday 20 June 2005 ( Morning Time: 1 hour 30 minutes Materials required for examination Items included with question papers Mathematical Formulae (Green) Nil Candidates may use any calculator EXCEPT those with the facility for symbolic algebra, differentiation and/or integration. Thus candidates may NOT use calculators such as the Texas Instruments TI 89, TI 92, Casio CFX 9970G, Hewlett Packard HP48G. Instructions to Candidates Write the name of the examining body (Edexcel), your centre number, candidate number, the unit title (Core Mathematics C3), the paper reference (6665), your surname, initials and signature. Information for Candidates A booklet Mathematical Formulae and Statistical Tables is provided. Full marks may be obtained for answers to ALL questions. There are 7 questions in this question paper. The total mark for this paper is 75. Advice to Candidates You must ensure that your answers to parts of questions are clearly labelled. You must show sufficient working to make your methods clear to the Examiner. Answers without working may gain no credit. 1. (a) Given that sin2 ( + cos2 ( ( 1, show that 1 + tan2 ( ( sec2 (. (2) (b) Solve, for 0 ( ( < 360(, the equation 2 tan2 ( + sec ( = 1, giving your answers to 1 decimal place. (6)  2. (a) Differentiate with respect to x (i) 3 sin2 x + sec 2x, (3) (ii) {x + ln (2x)}3. (3) Given that y =  EMBED Equation.3 , x ( 1, (b) show that  EMBED Equation.3  =  EMBED Equation.3 . (6)  3. The function f is defined by f: x  EMBED Equation.3  EMBED Equation.3   EMBED Equation.3 , x > 1. (a) Show that f(x) =  EMBED Equation.3 , x > 1. (4) (b) Find f 1(x). (3) The function g is defined by g: x  EMBED Equation.3 x2 + 5, x ( !. (b) Solve fg(x) =  EMBED Equation.3 . (3)  4. f(x) = 3ex   EMBED Equation.3 ln x  2, x > 0. (a) Differentiate to find f ((x). (3) The curve with equation y = f(x) has a turning point at P. The x-coordinate of P is (. (b) Show that ( =  EMBED Equation.3 e(. (2) The iterative formula xn + 1 =  EMBED Equation.3 , x0 = 1, is used to find an approximate value for (. (c) Calculate the values of x1, x2, x3 and x4, giving your answers to 4 decimal places. (2) (d) By considering the change of sign of f ((x) in a suitable interval, prove that ( = 0.1443 correct to 4 decimal places. (2)  5. (a) Using the identity cos (A + B) ( cos A cos B sin A sin B, prove that cos 2A ( 1 2 sin2 A. (2) (b) Show that 2 sin 2( 3 cos 2( 3 sin ( + 3 ( sin ( (4 cos ( + 6 sin ( 3). (4) (c) Express 4 cos ( + 6 sin ( in the form R sin (( + ( ), where R > 0 and 0 < ( <  EMBED Equation.3 . (4) (d) Hence, for 0 ( ( < (, solve 2 sin 2( = 3(cos 2( + sin ( 1), giving your answers in radians to 3 significant figures, where appropriate. (5)  6. Figure 1  Figure 1 shows part of the graph of y = f(x), x ( !. The graph consists of two line segments that meet at the point (1, a), a < 0. One line meets the x-axis at (3, 0). The other line meets the x-axis at ( 1, 0) and the y-axis at (0, b), b < 0. In separate diagrams, sketch the graph with equation (a) y = f(x + 1), (2) (b) y = f((x(). (3) Indicate clearly on each sketch the coordinates of any points of intersection with the axes. Given that f(x) = (x 1( 2, find (c) the value of a and the value of b, (2) (d) the value of x for which f(x) = 5x. (4)  7. A particular species of orchid is being studied. The population p at time t years after the study started is assumed to be p =  EMBED Equation.3 , where a is a constant. 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(4) (c) Show that p =  EMBED Equation.3 . (1) (d) Hence show that the population cannot exceed 2800. (2)  TOTAL FOR PAPER: 75 MARKS END N23494A  PAGE 4 N23494A This publication may only be reproduced in accordance with London Qualifications copyright policy. 2005 London Qualifications Limited. 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