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Vector Algebra question

2025 · Shift 1 · Q32
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  5. /2025 · Shift 1 · Q32

Vector Algebra question

2025 · Shift 1 · Q32

JEE AdvancedMathematicsVector AlgebraMCQ+4 / −1

Let w⃗=i^+j^−2k^\vec{w} = \hat{i} + \hat{j} - 2\hat{k}w=i^+j^​−2k^, and u⃗\vec{u}u and v⃗\vec{v}v be two vectors, such that u⃗×v⃗=w⃗\vec{u} \times \vec{v} = \vec{w}u×v=w and v⃗×w⃗=u⃗\vec{v} \times \vec{w} = \vec{u}v×w=u. Let α,β,γ\alpha, \beta, \gammaα,β,γ, and ttt be real numbers such that

u⃗=αi^+βj^+γk^,   −tα+β+γ=0,   α−tβ+γ=0,   α+β−tγ=0.\vec{u} = \alpha \hat{i} + \beta \hat{j} + \gamma \hat{k},\ \ \ - t \alpha + \beta + \gamma = 0,\ \ \ \alpha - t \beta + \gamma = 0,\ \ \ \alpha + \beta - t \gamma = 0.u=αi^+βj^​+γk^,   −tα+β+γ=0,   α−tβ+γ=0,   α+β−tγ=0.

Match each entry in List-I to the correct entry in List-II and choose the correct option.

List – I List – II
(P) ∣v⃗∣2\lvert \vec{v} \rvert^2∣v∣2 is equal to (1) 0
(Q) If α=3\alpha = \sqrt{3}α=3​, then γ2\gamma^2γ2 is equal to (2) 1
(R) If α=3\alpha = \sqrt{3}α=3​, then (β+γ)2(\beta + \gamma)^2(β+γ)2 is equal to (3) 2
(S) If α=2\alpha = \sqrt{2}α=2​, then t+3t + 3t+3 is equal to (4) 3
(5) 5
  1. A
    (P) →\to→(2)   (Q) →\to→(1)   (R) →\to→(4)   (S) →\to→ (5)
  2. B
    (P) →\to→(2)   (Q) →\to→(4)   (R) →\to→(3)   (S) →\to→ (5)
  3. C
    (P) →\to→(2)   (Q) →\to→(1)   (R) →\to→(4)   (S) →\to→ (3)
  4. D
    (P) →\to→(5)   (Q) →\to→(4)   (R) →\to→(1)   (S) →\to→ (3)
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