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

रेखाओं \(\overrightarrow{ r }=(\hat{ i }+\hat{ j })+\lambda(\hat{ i }+2 \hat{ j }-\hat{ k })\) तथा \(\overrightarrow{ r }=(\hat{ i }+\hat{ j })+\mu(-\hat{ i }+\hat{ j }-2 \hat{ k })\) को अंतर्विष्ट करते समतल पर बिन्दु \((2,1,4)\) से डाले गये लम्ब की लम्बाई है

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

Answer & Solution

Correct Answer

(B) \(\sqrt 3\)

Step-by-step Solution

Detailed explanation

Equation of plane containing both lines is \(\left| {\begin{array}{*{20}{c}} {x - 1}&{y - 1}&z\\ 1&2&{ - 1}\\ { - 1}&1&{ - 2} \end{array}} \right| = 0\) \((x-1)(-4+1)+(y-1)(1+2)+z(1+2)=0\) \(-3(x-1)+3(y-1)+3 z=0\) \(-x+1+y-1+z=0\)…
From JEE Mains
Explore more questions on app