AQA C4 2012 January — Question 5

Exam BoardAQA
ModuleC4 (Core Mathematics 4)
Year2012
SessionJanuary
TopicParametric equations

5 A curve is defined by the parametric equations $$x = 8 t ^ { 2 } - t , \quad y = \frac { 3 } { t }$$
  1. Show that the cartesian equation of the curve can be written as \(x y ^ { 2 } + 3 y = k\), stating the value of the integer \(k\).
    (2 marks)
    1. Find an equation of the tangent to the curve at the point \(P\), where \(t = \frac { 1 } { 4 }\).
    2. Verify that the tangent at \(P\) intersects the curve when \(x = \frac { 3 } { 2 }\).