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JEE Mains · Maths · STD 12 - 10. vector algebra

यदि \(\overrightarrow{ a } \cdot \overrightarrow{ b }=1, \overrightarrow{ b } \cdot \overrightarrow{ c }=2\) तथा \(\overrightarrow{ c } \cdot \overrightarrow{ a }=3\) है, तो \([\overrightarrow{ a } \times(\overrightarrow{ b } \times \overrightarrow{ c }), \overrightarrow{ b } \times(\overrightarrow{ c } \times \overrightarrow{ a }), \overrightarrow{ c } \times(\overrightarrow{ b } \times \overrightarrow{ a })]\) का मान है

  1. A \(0\)
  2. B \(-6 \overrightarrow{ a } \cdot(\overrightarrow{ b } \times \overrightarrow{ c })\)
  3. C \(12 \overrightarrow{ c } \cdot(\overrightarrow{ a } \times \overrightarrow{ b })\)
  4. D \(-12 \vec{b} \cdot(\vec{c} \times \vec{a})\)
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Correct Answer

(A) \(0\)

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\(\overrightarrow{ a } \times(\overrightarrow{ b } \times \overrightarrow{ c })=(\overrightarrow{ a } \cdot \overrightarrow{ c }) \overrightarrow{ b }-(\overrightarrow{ a } \cdot \overrightarrow{ b }) \overrightarrow{ c }=3 \overrightarrow{ b }-\overrightarrow{ c }\)…
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