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

सदिश \(2 \hat{ i }+3 \hat{ j }+\hat{ k }\) के सदिशों \(\hat{ i }+\hat{ j }+\hat{ k }\) तथा \(\hat{ i }+2 \hat{ j }+3 \hat{ k }\) को अंतर्विष्ट करने वाले समतल के लंबवर्तीय सदिश पर प्रक्षेप का परिमाण है

  1. A \(3\sqrt 6 \)
  2. B \(\frac{{\sqrt 3 }}{2}\)
  3. C \(\sqrt 6 \)
  4. D \(\sqrt {\frac{3}{2}} \)
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Answer & Solution

Correct Answer

(D) \(\sqrt {\frac{3}{2}} \)

Step-by-step Solution

Detailed explanation

Vector perpendicular to plane containing the vectors \(\hat{i}+\hat{j}+\hat{k} d \hat{i}+2 \hat{j}+3 \hat{k}\) is parallel to vector \( = \left| {\begin{array}{*{20}{l}} {\hat i}&{\hat j}&{\hat k}\\ 1&1&1\\ 1&2&3 \end{array}} \right| = \hat i - 2\hat j + \hat k\) Required…
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