2024 IGCSE Additional Mathematics May/June 0606/12 Q7

2024 IGCSE Additional Mathematics May/June 0606/12 Q7

11 marks
  1. The line \(y=3x-2\) intersects the curve \(2x^2-xy+y^2=2\) at the points \(A\) and \(B\). The point \(C\) with coordinates \(\left(k,\dfrac78\right)\) lies on the perpendicular bisector of the line \(AB\). Find the exact value of \(k\).[9]
  2. The point \(D\) lies on the perpendicular bisector of \(AB\) such that \(D\) is a reflection of \(C\) in the line \(AB\). Find the coordinates of \(D\).[2]

Solution:

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Answer:(a) \(k=-\dfrac{19}8\). (b) \(D=\left(\dfrac{29}8,-\dfrac98\right)\).

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