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CBSE Class 12 Math 2019 Delhi Set 1 Solved Paper

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Question : 23
Total: 29
Find the value of λ, so that the lines ‌
1−x
3
=‌
7y−14
λ
=‌
z−3
2
 and ‌
7−7x
3λ
=‌
y−5
1
=‌
6−z
5
 are at right angles. Also, find whether the lines are intersecting or not.
Solution:  
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