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

यदि बिन्दु \((2, \alpha, \beta)\) उस समतल पर स्थित है जो बिन्दुओं \((3,4,2)\) तथा \((7,0,6)\) से हो कर जाता है तथा समतल \(2 x -5 y =15\) के लम्बवत् है, तो \(2 \alpha-3 \beta\) बराबर है

  1. A \(12\)
  2. B \(7\)
  3. C \(5\)
  4. D \(17\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(7\)

Step-by-step Solution

Detailed explanation

\(A(7,0,6)\) and \(B(3,4,2)\) \(\overrightarrow {{\rm{AB}}} = - 4\widehat {\rm{i}} + 4\widehat {\rm{j}} - 4\widehat {\rm{k}}\) Also \(2 \hat{i}-5 \hat{j}\) is parallel to the plane \(\Rightarrow\) Normal perpendicular to the required plane is \(\)\left| {\begin{array}{*{20}{c}}…
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