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

બિંદુ \((1,-2,5)\) થી  રેખાનું લંબ અંતર મેળવો કે જે બિંદુ \((1,2,4)\) માંથી પસાર થાય અને રેખા  \(x + y - z =0= x -2 y +3 z -5\) ને સમાંતર હોય. 

  1. A \(\sqrt{\frac{21}{2}}\)
  2. B \(\sqrt{\frac{9}{2}}\)
  3. C \(\sqrt{\frac{73}{2}}\)
  4. D \(1\)
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Answer & Solution

Correct Answer

(A) \(\sqrt{\frac{21}{2}}\)

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Detailed explanation

\(d.r\)'s of the line \(=\left|\begin{array}{ccc}\hat{i} & \hat{j} & \hat{k} \\ 1 & 1 & -1 \\ 1 & -2 & 3\end{array}\right|=\hat{i}-4 \hat{j}-3 \hat{k}\) \(\therefore\) equation of line is…
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