NJC Parametric Equations Tutorial Q5

NJC Parametric Equations Tutorial Q5

Tutorial

A curve \(C\) is given by the parametric equations \(x={{t}^{2}}+3\), \(y=t\left( {{t}^{2}}+3 \right)\).

  1. Find a Cartesian equation of \(C\) and hence show, using an algebraic method, that the curve is symmetrical about the \(x\)-axis.
  2. Show, using an algebraic method, that there is no part of the curve for which \(x<3\).
  3. Sketch \(C\), indicating clearly the points where the curve crosses the \(x\)- and \(y\)- axes, if any.

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Answer:\(y^2 = x^3 - 3x^2\)

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