Differentiation Past Papers Unit 1 Outcome 3
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1 PSf Differentiation Past Papers Unit 1 utcome 3 1. Differentiate 2 3 with respect to. A. 6 B C D Given f () = 3 2 (2 1), find f ( 1) Find the coordinates of the point on the curve = where the tangent to the curve makes an angle of 45 with the positive direction of the -ais If = 2, show that d d = Find f (4) where f () = Find d d where = If f () = k and f (1) = 14, find the value of k Find the -coordinate of each of the points on the curve = at which the tangent is parallel to the -ais Calculate, to the nearest degree, the angle between the -ais and the tangent to the curve with equation = at the point where = 2. 4 hsn.uk.net Page 1 Questions marked c SQA
2 PSf 10. The point P( 1, 7) lies on the curve with equation = Find the equation of the tangent to the curve at P Find the equation of the tangent to the curve = at the point where = Find the equation of the tangent to the curve with equation = at the point where = Find the equation of the tangent to the curve = at the point where = The point P( 2, b) lies on the graph of the function f () = (a) Find the value of b. 1 (b) Prove that this function is increasing at P For what values of is the function f () = increasing? Given that = 2 2 +, find d d ( and hence show that 1 + d ) = 2. 3 d 17. hsn.uk.net Page 2 Questions marked c SQA
3 PSf PSf 18. The graph of a function f intersects the -ais at ( a, 0) and (e, 0) as shown. There is a point of infleion at (0, b) and a maimum turning point at (c, d). Sketch the graph of the derived function f. ( a, 0) 3 (e, 0) = f () (0, b) (c, d) A function f is defined b the formula f () = ( 1) 2 ( + 2) where R. (a) Find the coordinates of the points where the curve with equation = f () crosses the - and -aes. 3 (b) Find the stationar points of this curve = f () and determine their nature. 7 (c) Sketch the curve = f () hsn.uk.net Page 3 Questions marked c SQA
4 PSf A compan spends thousand P pounds a ear on advertising PSf and this results in a profit of P thousand pounds. A mathematical model, illustrated in the diagram, suggests that P and are related b P = for Find the value of which gives the (12, 0) maimum profit A ball is thrown verticall upwards. The height h metres of the ball t seconds after it is thrown, is given b the formula h = 20t 5t 2. (a) Find the speed of the ball when it is thrown (i.e. the rate of change of height with respect to time of the ball when it is thrown). 3 (b) Find the speed of the ball after 2 seconds. Eplain our answer in terms of the movement of the ball. 2 Questions marked c SQA hsn.uk.net Page 4
5 PSf 26. A sketch of the graph of = f () where f () = is shown below. The graph has a maimum at A and a minimum at B(3, 0). PSf A = f () B(3, 0) (a) Find the coordinates of the turning point at A. 4 (b) Hence sketch the graph of = g() where g() = f ( + 2) + 4. Indicate the coordinates of the turning points. There is no need to calculate the coordinates of the points of intersection with the aes. 2 (c) Write down the range of values of k for which g() = k has 3 real roots A curve has equation = (a) Find algebraicall the coordinates of the stationar points. 6 (b) Determine the nature of the stationar points A curve has equation = Prove that this curve has no stationar points Find the values of for which the function f () = is increasing A curve has equation = 16, > 0. Find the equation of the tangent at the point where = A ball is thrown verticall upwards. After t seconds its height is h metres, where h = t 4 9t 2. (a) Find the speed of the ball after 1 second. 3 (b) For how man seconds is the ball travelling upwards? 2 Questions marked c SQA hsn.uk.net Page 5
6 PSf hsn.uk.net Page 6 Questions marked c SQA
7 PSf A goldsmith has built up a solid which consists of a triangular prism of fied volume with a regular tetrahedron at each end. The surface area, A, of the solid is given b A() = ( ) PSf where is the length of each edge of the tetrahedron. Find the value of which the goldsmith should use to minimise the amount of gold plating required to cover the solid. 6 hsn.uk.net Page 7 Questions marked c SQA
8 PSf hsn.uk.net Page 8 Questions marked c SQA
9 PSf hsn.uk.net Page 9 Questions marked c SQA
10 43. The shaded rectangle on this map represents the planned etension to the village hall. It is hoped to provide the largest possible area for the etension. PSf PSf The Vennel 6 m Village hall 8 m Manse Lane PSf The coordinate diagram represents the right angled triangle of ground behind the hall. The etension has length l metres and breadth b metres, as shown. ne corner of the etension is at the point (a, 0). (a) (i) Show that l = 5 4 a. (0, 6) l b (a, 0) (8, 0) (ii) Epress b in terms of a and hence deduce that the area, A m 2, of the etension is given b A = 3 4a(8 a). 3 (b) Find the value of a which produces the largest area of the etension. 4 hsn.uk.net Page 10 Questions marked c SQA
11 PSf 44. hsn.uk.net Page 11 Questions marked c SQA
12 PSf 45. hsn.uk.net Page 12 Questions marked c SQA
13 PSf 46. [END F QUESTINS] hsn.uk.net Page 13 Questions marked c SQA
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