Coordinate Geometry June 2020 Question | AS & A Level Pure Math 1 | #IGCSE Math

This video discuss the AS & A Level Pure Math 1 Question
The equation of a line is y = mx + c, where m and c are constants, and the equation of a curve is xy = 16.
(a) Given that the line is a tangent to the curve, express m in terms of c.
(b) Given instead that m = −4, find the set of values of c for which the line intersects the curve at two distinct points.

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