If - then - equals to

The correct option is A |α⃗|^2(β⃗.γ⃗) α #160; ∥ (β #160; ×γ #160; ) α is perpendicular to both β and γ (α×γ)=| α| | γ| β ...

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Area and Volume Expansion

If α⃗||β⃗×γ...

Question

If $\to α | | (\to β \times \to γ)$ , then $(\to α \times \to β) . (\to α \times \to γ)$ equals to

| \to α |^{2} (\to β . \to γ)

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| \to β |^{2} (\to γ . \to α)

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| \to γ |^{2} (\to α . \to β)

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| \to α | | \to β | | \to γ |

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