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AP EAMCET · Maths · Vector Algebra

If \(\mathbf{a}=\hat{\mathbf{i}}-2 \hat{\mathbf{j}}-3 \hat{\mathbf{k}}, \mathbf{b}=2 \hat{\mathbf{i}}+\hat{\mathbf{j}}-\hat{\mathbf{k}}, \mathbf{c}=\hat{\mathbf{i}}+3 \hat{\mathbf{j}}-2 \hat{\mathbf{k}}\), then
\([(\mathbf{a} \times \mathbf{b}) \times(\mathbf{b} \times \mathbf{c})(\mathbf{b} \times \mathbf{c}) \times(\mathbf{c} \times \mathbf{a})(\mathbf{c} \times \mathbf{a}) \times(\mathbf{a} \times \mathbf{b})]=\)

  1. A 160000
  2. B -8000
  3. C 400
  4. D -40
Verified Solution

Answer & Solution

Correct Answer

(A) 160000

Step-by-step Solution

Detailed explanation

We have, \[ \begin{aligned} & \mathbf{a}=\hat{\mathbf{i}}-2 \hat{\mathbf{j}}-3 \hat{\mathbf{k}} \\ & \mathbf{b}=2 \hat{\mathbf{i}}+\hat{\mathbf{j}}-\hat{\mathbf{k}} \\ & \mathbf{c}=\hat{\mathbf{i}}+3 \hat{\mathbf{j}}-2 \hat{\mathbf{k}} \end{aligned} \] Now,…