9709 P31 - Nov 2019 - Q7I - 4 marks
2140
Two lines l and m have equations r = ai + 2j + 3k + λ(i − 2j + 3k) and r = 2i + j + 2k + μ(2i − j + k) respectively, where a is a constant. It is given that the lines intersect.
Find the value of a.
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