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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class11  >>  3-D Geometry
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Q)

The lines r=a1+λb1 and r=a2+αb2 are coplanar if ?

(a)a1×a2=0(b)b1×b2=0(c)(a1a2)×(b1b2)=0(d)[a1b1b2]=[a2b1b2]

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