CBSE 2023 · Region 2 · Set 1 · Q8 · 1 mark
Unit vector along $\displaystyle \overrightarrow{\mathrm{PQ}}$, where coordinates of P and Q respectively are $\displaystyle (2,1,-1)$ and $\displaystyle (4,4,-7)$, is
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \frac{2 \hat{\mathrm{i}}}{7}+\frac{3 \hat{\mathrm{j}}}{7}-\frac{6 \hat{\mathrm{k}}}{7}$
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CBSE Class 12 Mathematics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.