ࡱ> ;=:}@ bjbjFF cb,,B(((($ d$d$d$P$H%| ]R%~N':'''GG GQQQQQQQ$SReUlRJDGJJR((''>RLPLPLPJp(''QLPJQLPLPLP'% 0d$TKLP(Q-R0]RLPU,MnULP  ((((ULPJI0zI"LPII,HHD&I$RR  Dd$O  d$Paper Reference(s) 6666 Edexcel GCE Core Mathematics C4 Advanced Level Monday 23 January 2006 ( Afternoon 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 In the boxes on the answer book, write the name of the examining body (Edexcel), your centre number, candidate number, the unit title (Core Mathematics C4), the paper reference (6666), your surname, other name and signature. 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 on this 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 curve C is described by the equation 3x2 + 4y2 2x + 6xy 5 = 0. Find an equation of the tangent to C at the point (1, 2), giving your answer in the form ax+by + c = 0, where a, b and c are integers. (7)  2. (a) Given that y = sec x, complete the table with the values of y corresponding to x = ,  and . x0 EMBED Equation.3  EMBED Equation.3  EMBED Equation.3 y11.20269 (2) (b) Use the trapezium rule, with all the values for y in the completed table, to obtain an estimate for  EMBED Equation.3 . Show all the steps of your working and give your answer to 4decimal places. (3) The exact value of  EMBED Equation.3  is ln (1 + (2). (c) Calculate the % error in using the estimate you obtained in part (b). (2)  3. Using the substitution u2 = 2x 1, or otherwise, find the exact value of  EMBED Equation.3 . (8)  4. Figure 1      Figure 1 shows the finite region R, which is bounded by the curve y = xex, the line x = 1, the line x = 3 and the x-axis. The region R is rotated through 360 degrees about the x-axis. Use integration by parts to find an exact value for the volume of the solid generated. (8)  5. f(x) =  EMBED Equation.3  =  EMBED Equation.3  +  EMBED Equation.3  +  EMBED Equation.3 , (x( <  EMBED Equation.3 . (a) Find the values of A and C and show that B = 0. (4) (b) Hence, or otherwise, find the series expansion of f(x), in ascending powers of x, up to and including the term in x3. Simplify each term. (7)  6. The line l1 has vector equation r = 8i + 12j + 14k + ((i + j k), where ( is a parameter. The point A has coordinates (4, 8, a), where a is a constant. The point B has coordinates (b,13, 13), where b is a constant. Points A and B lie on the line l1. (a) Find the values of a and b. (3) Given that the point O is the origin, and that the point P lies on l1 such that OP is perpendicular to l1, (b) find the coordinates of P. (5) (b) Hence find the distance OP, giving your answer as a simplified surd. (2)  7. The volume of a spherical balloon of radius r cm is V cm3, where V =  EMBED Equation.3 ( r 3. (a) Find  EMBED Equation.3 . (1) The volume of the balloon increases with time t seconds according to the formula  EMBED Equation.3  =  EMBED Equation.3 , t ( 0. (b) Using the chain rule, or otherwise, find an expression in terms of r and t for  EMBED Equation.3 . (2) (c) Given that V = 0 when t = 0, solve the differential equation  EMBED Equation.3  =  EMBED Equation.3 , to obtain V in terms of t. (4) (d) Hence, at time t = 5, (i) find the radius of the balloon, giving your answer to 3 significant figures, (3) (ii) show that the rate of increase of the radius of the balloon is approximately 2.90(102cms1. (2)  8. Figure 2    The curve shown in Figure 2 has parametric equations x = t 2 sin t, y = 1 2 cos t, 0 ( t ( 2(. (a) Show that the curve crosses the x-axis where t =  EMBED Equation.3  and t = EMBED Equation.3 . (2) The finite region R is enclosed by the curve and the x-axis, as shown shaded in Figure 2. (b) Show that the area R is given by the integral  EMBED Equation.3 . (3) (c) Use this integral to find the exact value of the shaded area. (7)  TOTAL FOR PAPER: 75 MARKS END N23533A  PAGE 4 N23553A This publication may only be reproduced in accordance with Edexcel Limited copyright policy. 2006 Edexcel Limited. N23553A  PAGE 2 N23553A  PAGE 5 O y x x 1 3 y = xex O R R y $67AFGJNP\]^_`i ! ( # $ ? տxnxnjx[RhQ5mH sH jhQ5UmHnHuhQhQCJmH sH hQ5CJmH sH hQ5>*CJmH sH hy~5CJ$mH sH  j-hQ5CJ$mH sH hK 5CJ$mH sH hQ5CJ$mH sH hg5CJ$mH sH hQ5CJ<mH sH hQ5CJ*mH sH h_5CJ*mH sH hg5CJ*mH sH hQCJ mH sH $8Gj& ' ( ! 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