If a = 3 i − j + 2 k , b = 2 i + j − k , then a × ( a ⋅ b ) =, 3 a, 3 14 , 0, None of these

a × ( a ⋅ b ) is not meaningful.

If a = 3 i − j + 2 k , b = 2 i + j − k , then a × ( a ⋅ b ) =

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If $\mathbf{a}=3 \mathbf{i}-\mathbf{j}+2 \mathbf{k}, \mathbf{b}=2 \mathbf{i}+\mathbf{j}-\mathbf{k}$, then $\mathbf{a} \times(\mathbf{a} \cdot \mathbf{b})=$

MathematicsVector AlgebraJEE Main

Options:

A $3 a$
B $3 \sqrt{14}$
C 0
D None of these

Solution:

2427 Upvotes Verified Answer

The correct answer is: None of these

$\quad \mathbf{a} \times(\mathbf{a} \cdot \mathbf{b})$ is not meaningful.

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