JEE Main 2019 (8 April Evening Shift)

Question

Let $\vec a=3\hat{i}+2\hat{j}+x\hat{k}$ and $\vec b=\hat{i}-\hat{j}+\hat{k}$, for some real $x$. Then $\left|\vec a	imes\vec bight|=r$ is possible if:

Accepted Answer

$r \ge 5\sqrt{\dfrac{3}{2}}$

Answer

$0 < r < \sqrt{\dfrac{3}{2}}$

Answer

$3\sqrt {{3 \over 2}} < r < 5\sqrt {{3 \over 2}} $

Answer

$\sqrt {{3 \over 2}} < r \le 3\sqrt {{3 \over 2}} $

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