🛠️ JEE➗ Maths

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.

a

(P) ⟶ (2) (Q) ⟶ (1) (R) ⟶ (4) (S) ⟶ (5)

b

(P) ⟶ (2) (Q) ⟶ (4) (R) ⟶ (3) (S) ⟶ (5)

c

(P) ⟶ (2) (Q) ⟶ (1) (R) ⟶ (4) (S) ⟶ (3)

d

(P) ⟶ (5) (Q) ⟶ (4) (R) ⟶ (1) (S) ⟶ (3

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