Let \(\vec{w}=\overset{^}{ı}+\overset{^}{ȷ}-2\overset{^}{k}\), and \(\vec{u}\) and \(\vec{v}\) be two vectors, such that…
Q1
Let \(\vec{w}=\overset{^}{ı}+\overset{^}{ȷ}-2\overset{^}{k}\), and \(\vec{u}\) and \(\vec{v}\) be two vectors, such that \(\vec{u}\times \vec{v}=\vec{w}\) and \(\vec{v}\times \vec{w}=\vec{u}\). Let \(\alpha ,\beta ,\gamma\), and \(t\) be real numbers such that \(\vec{u}=\alpha \overset{^}{ı}+\beta \overset{^}{ȷ}+\gamma \overset{^}{k},-t\alpha +\beta +\gamma =0,\alpha -t\beta +\gamma =0,\)
\(\text{ and }\alpha +\beta -t\gamma =0\)
| (P) | \(\ |\vec{v}|^2 \) is equal to | (1) | 0 |
| (Q) | If \(\ \alpha=\sqrt{3} \) , then \(\ \gamma^2 \) is equal to | (2) | 1 |
| (R) | If \(\ \alpha=\sqrt{3} \), then \(\ (\beta+\gamma)^2 \) is equal to | (3) | 2 |
| (S) | If \(\ \alpha=\sqrt{2} \), then \(\ t+3 \) is equal to | (4) | 3 |
| (5) | 5 |
Match each entry in List-I to the correct entry in List-II and choose the correct option.
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