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

यदि रेखा \(\mathrm{L}_1: \frac{\mathrm{x}-1}{2}=\frac{\mathrm{y}+1}{-3}=\frac{\mathrm{z}+4}{2}\) है तथा बिंदुओं \(\mathrm{A}(-4,4,3), \mathrm{B}(-1,6,3)\) से होकर जाने वाली और रेखा \(\frac{\mathrm{x}-3}{-2}=\frac{\mathrm{y}}{3}=\frac{\mathrm{z}-1}{1}\) के लंबवत रेखा \(\mathrm{L}_2\) है, तो \(\mathrm{L}_1\) तथा \(\mathrm{L}_2\) के बीच न्यूनतम दूरी ........... है।

  1. A \(\frac{121}{\sqrt{221}}\)
  2. B \(\frac{24}{\sqrt{117}}\)
  3. C \(\frac{141}{\sqrt{221}}\)
  4. D  \(\frac{42}{\sqrt{117}}\)
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Answer & Solution

Correct Answer

(C) \(\frac{141}{\sqrt{221}}\)

Step-by-step Solution

Detailed explanation

\begin{aligned} & \mathrm{L}_2=\frac{\mathrm{x}+4}{3}=\frac{\mathrm{y}-4}{2}=\frac{\mathrm{z}-3}{0} \\ & \therefore \mathrm{S} . \mathrm{D}=\frac{\left|\begin{array}{ccc}\mathrm{x}_2-\mathrm{x}_1 & \mathrm{y}_2-\mathrm{y}_1 & \mathrm{z}_2-\mathrm{z}_1 \mid \\ 2 & -3 & 2 \\ 3 & 2…

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