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If the straight line, x =1 + s, y = 3-la...

If the straight line, x =1 + s, y = 3-`lambda`s, z = 1+ `lambda`s and `x=t/2, y=1+t, z=2-t`, with parameters s and t and respectively, are coplanar, then `lambda` equals:

A

0

B

minus 1

C

minus 1/2

D

minus2

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The correct Answer is:
D
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