# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | Oct-Nov | (P1-9709/13) | Q#11

Question The diagram shows the curve . i.       Find the equation of the tangent to the curve at the point . ii.    Show that the x-coordinates of the points of intersection of the line   and the curve are given by the equation . Hence find these x- coordinates. iii.     The region shaded in the diagram is rotated through […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | Oct-Nov | (P1-9709/13) | Q#9

Question A curve has equation , where  is a positive constant. Find, in terms of ,  the values of  for which the curve has stationary points and determine the nature of  each stationary point. Solution A stationary point  on the curve  is the point where gradient of the curve is  equal to zero; We are given that; Therefore, we need […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | Oct-Nov | (P1-9709/12) | Q#9

Question The diagram shows part of the curve  and three points A, B and C on the  curve with x-coordinates 1, 2 and 5 respectively. i.       A point P moves along the curve in such a way that its x-coordinate increases at  a constant rate of 0.04 units per second. Find the rate at which the y-coordinate of P  […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | Oct-Nov | (P1-9709/12) | Q#6

Question In the diagram, S is the point  and T is the point . The point Q lies on ST,  between S and T, and has coordinates . The points P and R lie on the x-axis  and y-axis respectively and OPQR is a rectangle.      i.       Show that the area, A, of the rectangle OPQR is given by […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | Oct-Nov | (P1-9709/12) | Q#3

Question The equation of a curve is  .      i.    Find the gradient of the curve at the point where x = 2.    ii.   Find  and hence evaluate . Solution      i.   We are required to find gradient of the curve at a given point. Gradient (slope) of the curve at the particular point is […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | Oct-Nov | (P1-9709/11) | Q#10

Question The diagram shows the curve  and the tangent to the curve at the point . i.         Find the equation of this tangent, giving your answer in the form . ii.       Find the area of the shaded region. Solution i.   We are required to find equation of the tangent to the curve at point […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | Oct-Nov | (P1-9709/11) | Q#8

Question The inside lane of a school running track consists of two straight sections each of  length x metres, and two semicircular sections each of radius r metres, as shown in  the diagram. The straight sections are perpendicular to the diameters of the  semicircular sections. The perimeter of the inside lane is 400 metres. i.       Show that the area, Am2, […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | May-Jun | (P1-9709/13) | Q#11

Question The diagram shows part of the curve  and a point  and  which lie on the curve. The tangent to the curve at B intersects the line  at the point C.      i. Find the coordinates of C.    ii. Find the area of the shaded region. Solution i.   We are required to find the coordinates of point C. It is evident […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | May-Jun | (P1-9709/13) | Q#6

Question The non-zero variables x, y and u are such that . Given that , find the stationary value of u and determine whether this is a maximum or a  minimum value. Solution We are given that; We are also given; Substituting this value of  in the equation of . A stationary point  on the curve  is the point where gradient of the curve is […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | May-Jun | (P1-9709/12) | Q#11

Question The diagram shows the curve  , which intersects the x-axis at A and the  y-axis at B. The normal to the curve at B meets the x-axis at C. Find      i.       the equation of BC,    ii.       the area of the shaded region. Solution      i.   To find the equation of the line either we […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | May-Jun | (P1-9709/12) | Q#8

Question The volume of a solid circular cylinder of radius  cm is  cm3.      i.       Show that the total surface area, S cm2, of the cylinder is given by     ii.       Given that  can vary, find the stationary value of .   iii.       Determine the nature of this stationary value. Solution      i.   We are given that volume of solid circular cylinder; Expression […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | May-Jun | (P1-9709/11) | Q#10

Question The diagram shows part of the curve  and the point  on the curve. The tangent at A cuts the x-axis at B and the normal at A cuts the y-axis at C.      i.       Find the coordinates of B and C.  ii.   Find the distance AC, giving your answer in the form  , where a and b are integers.   iii.       Find the […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | May-Jun | (P1-9709/11) | Q#9

Question A curve has equation  and is such that .      i.       By using the substitution  , or otherwise, find the values of  for which the curve  has stationary points.    ii.     Find  and hence, or otherwise, determine the nature of each stationary point.   iii.       It is given that the curve  passes through the point . Find . Solution      i.   A […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 1 (P1-9709/01) | Year 2013 | May-Jun | (P1-9709/11) | Q#1

Question It is given that  , for . Show that  is an increasing function. Solution We are given the function; To test whether a function  is increasing or decreasing at a particular point , we take derivative of a function at that point. If  , the function  is increasing. If  , the function  is decreasing. If  , the test is inconclusive.   […]