# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#8

Question The equation of a curve is y2 + 2xy − x2 = 2.      i.       Find the coordinates of the two points on the curve where x = 1.    ii.       Show by differentiation that at one of these points the tangent to the curve is parallel to the x- […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#7

Question The diagram shows the curve y = e– x. The shaded region R is bounded by the curve and the lines y = 1 and x = p, where p is a constant.      i. Find the area of R in terms of p.    ii. Show that if the area of R […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#6

Question The curve with equation y = x ln x has one stationary point. i.       Find the exact coordinates of this point, giving your answers in terms of e. ii.       Determine whether this point is a maximum or a minimum point. Solution      i.   We are required to find […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#5

Question     i.       Express  in terms of .    ii.       Hence find the exact value of . Solution      i.   We are given that  and we are required to express it in terms of . Let us start from . We can write  as; We have the trigonometric identity;    ii.   […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#4

Question     i.       Show that the equation sin(60o − x) = 2 sin x can be written in the form tan x = k, where k is a  constant.    ii.        Hence solve the equation sin(60o − x) = 2 sin x, for 0o < x < 360o. Solution      i.   We […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#3

Question The polynomial , where a is a constant, is denoted by . It is given that  is a factor of . i.Find the value of  .    ii. When  has this value, factorise  completely. Solution      i.  We are given that;    We are also given that is a factor of . We […]

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#2

Question Solve the equation ln(3 − x2) = 2 ln x, giving your answer correct to 3 significant figures. Solution We are given; Power Rule; Taking anti-logarithm of both sides;  for any Since we have and logarithm of negative number is not possible, therefore;

# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2009 | Oct-Nov | (P2-9709/21) | Q#1

Question Solve the inequality . Solution SOLVING INEQUALITY: PIECEWISE Let, . We can write it as; We have to consider both moduli separately and it leads to following cases; When If then above four intervals translate to following with their corresponding inequality; When When When If then above four intervals translate to following […]