Exam-Style Problems

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Nov 2020 p11 q1
311

Find the set of values of m for which the line with equation \(y = mx - 3\) and the curve with equation \(y = 2x^2 + 5\) do not meet.

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June 2020 p13 q1
312

Find the set of values of m for which the line with equation \(y = mx + 1\) and the curve with equation \(y = 3x^2 + 2x + 4\) intersect at two distinct points.

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June 2020 p12 q6
313

The equation of a curve is \(y = 2x^2 + kx + k - 1\), where \(k\) is a constant. Given that the line \(y = 2x + 3\) is a tangent to the curve, find the value of \(k\).

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June 2020 p11 q5
314

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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Nov 2019 p13 q6
315

A line has equation \(y = 3kx - 2k\) and a curve has equation \(y = x^2 - kx + 2\), where \(k\) is a constant.

(i) Find the set of values of \(k\) for which the line and curve meet at two distinct points.

(ii) For each of two particular values of \(k\), the line is a tangent to the curve. Show that these two tangents meet on the x-axis.

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