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JEE Mains · Maths · STD 12 - 11. three dimension geometry

એક સમતલ બિંદુઓ \(A (1,2,3), B (2,3,1)\) અને \(C (2,4,2)\) માંથી પસાર થાય છે. જો \(O\) ઊગમબિંદુ અને \(P\) એ \((2, -1, 1)\) હોય, તો \(\overline{ OP }\) નાં આ સમતલ પરના પ્રક્ષેપની લંબાઈ ..... છે.

  1. A \(\sqrt{\frac{2}{7}}\)
  2. B \(\sqrt{\frac{2}{3}}\)
  3. C \(\sqrt{\frac{2}{11}}\)
  4. D \(\sqrt{\frac{2}{5}}\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\sqrt{\frac{2}{11}}\)

Step-by-step Solution

Detailed explanation

Normal to plane \(\vec{n}=\left|\begin{array}{ccc}\hat{i} & \hat{j} & \hat{k} \\ 1 & 1 & -2 \\ 0 & 1 & 1\end{array}\right|\) \(=3 \hat{i}-\hat{j}+\hat{k}\) \(\overline{O P}=2 \hat{i}-\hat{j}+\hat{k}\)…
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