| Exam Board | CAIE |
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| Module | P2 (Pure Mathematics 2) |
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| Year | 2014 |
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| Session | November |
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| Topic | Implicit equations and differentiation |
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3 A curve has equation
$$3 \ln x + 6 x y + y ^ { 2 } = 16$$
Find the equation of the normal to the curve at the point \(( 1,2 )\). Give your answer in the form \(a x + b y + c = 0\), where \(a , b\) and \(c\) are integers.