| Exam Board | OCR |
|---|
| Module | C4 (Core Mathematics 4) |
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| Year | 2013 |
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| Session | June |
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| Topic | Vectors 3D & Lines |
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3 Determine whether the lines whose equations are
$$\mathbf { r } = ( 1 + 2 \lambda ) \mathbf { i } - \lambda \mathbf { j } + ( 3 + 5 \lambda ) \mathbf { k } \text { and } \mathbf { r } = ( \mu - 1 ) \mathbf { i } + ( 5 - \mu ) \mathbf { j } + ( 2 - 5 \mu ) \mathbf { k }$$
are parallel, intersect or are skew.