| Exam Board | Edexcel |
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| Module | P1 (Pure Mathematics 1) |
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| Year | 2020 |
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| Session | January |
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| Topic | Quadratic Functions |
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8. The straight line \(l\) has equation \(y = k ( 2 x - 1 )\), where \(k\) is a constant.
The curve \(C\) has equation \(y = x ^ { 2 } + 2 x + 11\)
Find the set of values of \(k\) for which \(l\) does not cross or touch \(C\).
(6)