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Question

Two lines L1 : x=5, y3α=z2 and L2 : x=α, y1=Z2α are coplanar. Then α can take value(s)


A
1
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B
2
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C
3
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D
4
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Solution

The correct options are
A 1
D 4

x50=y03α=z02

xα0=y1=z2α

will be coplanar, if the shortest distance is zero.
∣ ∣5α0003α2012α∣ ∣=0
(5α)(α25α+4)=0, α=1,4,5
Hence, option A and D are correct.

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