Mathematics · 2019
JEE Main · 12 January 2019, Shift 1 · Q85
The sum of the distinct real values of μ, for which the vectors, μ i + j + k, i +μ j + k, i + j +μ k are co-planar, is:
The sum of the distinct real values of $\displaystyle \mu$, for which the vectors, $\displaystyle \mu \hat{i}+\hat{j}+\hat{k}$,
$$\hat{i}+\mu \hat{j}+\hat{k}, \quad \hat{i}+\hat{j}+\mu \hat{k} \quad \text { are }
$$
co-planar, is :
Official answer
(2)
$\displaystyle -1$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.