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MathsJEE Main 23 Jan 2026, Shift 1·Q3·MCQ·Easy–moderate

Vectors · Vector triple product

Let a⃗=−i^+j^+2k^\vec a = -\hat i + \hat j + 2\hat k, b⃗=i^−j^−3k^\vec b = \hat i - \hat j - 3\hat k, c⃗=a⃗×b⃗\vec c = \vec a\times\vec b and d⃗=c⃗×a⃗\vec d = \vec c\times\vec a. Then (a⃗−b⃗)⋅d⃗\left(\vec a - \vec b\right)\cdot\vec d is equal to:
  1. (1)4
  2. (2)−4-4
  3. (3)−2-2
  4. (4)2

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