CUET and UG exam WB JEE Mock Test Series 2025 Mathematics Vector Algebra Properties of Vectors

If three vectors 2î - ĵ + k̂, î + 2ĵ - 3k̂ and 3î + λĵ + 5k̂ are co-planar, then λ is:

1
-1
2
-2
3
-3
4
-4
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