Teaching UP TGT Mock Test Series 2025 Mathematics Vector Algebra Applications of Vectors

Find the value of λ, for which the vectors \(\vec a = 2\hat i - \hat j + \hat k, \vec b = \;\hat i + 2\hat j + 3\hat k\;and\; \vec c = 3\hat i + \lambda \hat j + 5\hat k\) are coplanar?

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