CBSE 2025 · Region 5 · Set 1 · Q18 · 1 mark
The respective values of $\displaystyle |\overrightarrow{\mathrm{a}}|$ and $\displaystyle |\overrightarrow{\mathrm{b}}|$, if given $\displaystyle (\vec{\mathrm{a}}-\vec{\mathrm{b}}) \cdot(\vec{\mathrm{a}}+\vec{\mathrm{b}})=512$ and $\displaystyle |\vec{\mathrm{a}}|=3|\vec{\mathrm{b}}|$, are:
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 24$ and $\displaystyle 8$
Vector AlgebraProduct of Two VectorsApplymcqmedium
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CBSE Class 12 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.